Tendon
The Achilles tendon, one of the tendons in the human body.
Micrograph of a piece of tendon. H&E stain.
Latin	tendo
Code	TH H3.03.00.0.00020
Dorlands/Elsevier	Tendon

A tendon (or sinew) is a tough band of fibrous connective tissue that usually connects muscle to bone^[1] and is capable of withstanding tension. Tendons are similar to ligaments and fasciae as they are all made of collagen except that ligaments join one bone to another bone, and fasciae connect muscles to other muscles. Tendons and muscles work together.

Structure[link]

Normal healthy tendons are composed mostly of parallel arrays of collagen fibers closely packed together. The dry mass of normal tendons, which makes up about 30% of the total mass with water, is composed of about 86% collagen, 2% elastin, 1–5% proteoglycans, and 0.2% inorganic components such as copper, manganese, and calcium.^[2][3] The collagen portion is made up of 97–98% type I collagen, with small amounts of other types of collagen. These include type II collagen in the cartilaginous zones, type III collagen in the reticulin fibres of the vascular walls, type IX collagen, type IV collagen in the basement membranes of the capillaries, type V collagen in the vascular walls, and type X collagen in the mineralized fibrocartilage near the interface with the bone.^[2][4] Collagen fibres coalesce into macroaggregates. After secretion from the cell, the terminal peptides are cleaved by procollagen N- and C-proteinases, and the tropocollagen molecules spontaneously assemble into insoluble fibrils. A collagen molecule is about 300 nm long and 1–2 nm wide, and the diameter of the fibrils that are formed can range from 50–500 nm. In tendons, the fibrils then assemble further to form fascicles, which are about 10 mm in length with a diameter of 50–300 μm, and finally into a tendon fibre with a diameter of 100–500 μm.^[5] Groups of fascicles are bounded by the epitendon and peritendon to form the tendon organ.

The collagen in tendons are held together with proteoglycan components, including decorin and, in compressed regions of tendon, aggrecan, which are capable of binding to the collagen fibrils at specific locations.^[6] The proteoglycans are interwoven with the collagen fibrils—their glycosaminoglycan (GAG) side chains have multiple interactions with the surface of the fibrils—showing that the proteoglycans are important structurally in the interconnection of the fibrils.^[7] The major GAG components of the tendon are dermatan sulfate and chondroitin sulfate, which associate with collagen and are involved in the fibril assembly process during tendon development. Dermatan sulfate is thought to be responsible for forming associations between fibrils, while chondroitin sulfate is thought to be more involved with occupying volume between the fibrils to keep them separated and help withstand deformation.^[8] The dermatan sulfate side chains of decorin aggregate in solution, and this behavior can assist with the assembly of the collagen fibrils. When decorin molecules are bound to a collagen fibril, their dermatan sulfate chains may extend and associate with other dermatan sulfate chains on decorin that is bound to separate fibrils, therefore creating interfibrillar bridges and eventually causing parallel alignment of the fibrils.^[9]

The tenocytes produce the collagen molecules, which aggregate end-to-end and side-to-side to produce collagen fibrils. Fibril bundles are organized to form fibres with the elongated tenocytes closely packed between them. There is a three-dimensional network of cell processes associated with collagen in the tendon. The cells communicate with each other through gap junctions, and this signalling gives them the ability to detect and respond to mechanical loading.^[10]

Blood vessels may be visualized within the endotendon running parallel to collagen fibres, with occasional branching transverse anastomoses.

The internal tendon bulk is thought to contain no nerve fibres, but the epi- and peritendon contain nerve endings, while Golgi tendon organs are present at the junction between tendon and muscle.

Tendon length varies in all major groups and from person to person. Tendon length is practically the discerning factor where muscle size and potential muscle size is concerned. For example, should all other relevant biological factors be equal, a man with a shorter tendons and a longer biceps muscle will have greater potential for muscle mass than a man with a longer tendon and a shorter muscle. Successful bodybuilders will generally have shorter tendons. Conversely, in sports requiring athletes to excel in actions such as running or jumping, it is beneficial to have longer than average Achilles tendon and a shorter calf muscle.^[11]

Tendon length is determined by genetic predisposition, and has not been shown to either increase or decrease in response to environment, unlike muscles, which can be shortened by trauma, use imbalances and a lack of recovery and stretching.^[12]

Function[link]

Tendons have been traditionally considered to simply be a mechanism by which muscles connect to bone, functioning simply to transmit forces. However, over the past two decades, much research focused on the elastic properties of tendons and their ability to function as springs. This allows tendons to passively modulate forces during locomotion, providing additional stability with no active work. It also allows tendons to store and recover energy at high efficiency. For example, during a human stride, the Achilles tendon stretches as the ankle joint dorsiflexes. During the last portion of the stride, as the foot plantar-flexes (pointing the toes down), the stored elastic energy is released. Furthermore, because the tendon stretches, the muscle is able to function with less or even no change in length, allowing the muscle to generate greater force.

The mechanical properties of the tendon are dependent on the collagen fiber diameter and orientation. The collagen fibrils are parallel to each other and closely packed, but show a wave-like appearance due to planar undulations, or crimps, on a scale of several micrometers.^[13] In tendons, the collagen I fibres have some flexibility due to the absence of hydroxyproline and proline residues at specific locations in the amino acid sequence, which allows the formation of other conformations such as bends or internal loops in the triple helix and results in the development of crimps.^[14] The crimps in the collagen fibrils allow the tendons to have some flexibility as well as a low compressive stiffness. In addition, because the tendon is a multi-stranded structure made up of many partially independent fibrils and fascicles, it does not behave as a single rod, and this property also contributes to its flexibility.^[15]

The proteoglycan components of tendons also are important to the mechanical properties. While the collagen fibrils allow tendons to resist tensile stress, the proteoglycans allow them to resist compressive stress. The elongation and the strain of the collagen fibrils alone have been shown to be much lower than the total elongation and strain of the entire tendon under the same amount of stress, demonstrating that the proteoglycan-rich matrix must also undergo deformation, and stiffening of the matrix occurs at high strain rates.^[16] These molecules are very hydrophilic, meaning that they can absorb a large amount of water and therefore have a high swelling ratio. Since they are noncovalently bound to the fibrils, they may reversibly associate and disassociate so that the bridges between fibrils can be broken and reformed. This process may be involved in allowing the fibril to elongate and decrease in diameter under tension.^[17]

Mechanics[link]

Tendons are viscoelastic structures and are more stretchable than ligaments. When stretched, tendons have a soft tissue mechanical behavior. Several studies have demonstrated that tendons respond to changes in mechanical loading with growth and remodeling processes, much like bones. In particular, a study showed that disuse of the Achilles tendon in rats resulted in a decrease in the average thickness of the collagen fiber bundles comprising the tendon.^[18] In humans, an experiment in which people were subjected to a simulated microgravity environment found that tendon stiffness decreased significantly, even when subjects were required to perform resistive exercises.^[19] These effects have implications in areas ranging from treatment of bedridden patients to the design of more effective exercises for astronauts.

Pathology[link]

Tendons are subject to many types of injuries. There are various forms of tendinopathies or tendon injuries due to overuse. These types of injuries generally result in inflammation and degeneration or weakening of the tendons, which may eventually lead to tendon rupture.^[20] Tendinopathies can be caused by a number of factors relating to the tendon extracellular matrix, and their classification has been difficult because their symptoms and histopathology often are similar.

The first category of tendinopathy is paratenonitis, which refers to inflammation of the paratenon, or paratendinous sheet located between the tendon and its sheath. Tendinosis refers to non-inflammatory injury to the tendon at the cellular level. The degradation is caused by damage to collagen, cells, and the vascular components of the tendon, and is known to lead to rupture.^[21] Observations of tendons that have undergone spontaneous rupture have shown the presence of collagen fibrils that are not in the correct parallel orientation or are not uniform in length or diameter, along with rounded tenocytes, other cell abnormalities, and the ingrowth of blood vessels.^[20] Other forms of tendinosis that have not led to rupture have also shown the degeneration, disorientation, and thinning of the collagen fibrils, along with an increase in the amount of glycosaminoglycans between the fibrils.^[22] The third is paratenonitis with tendinosis, in which combinations of paratenon inflammation and tendon degeneration are both present. The last is tendinitis, which refers to degeneration with inflammation of the tendon as well as vascular disruption.^[2]

Tendinopathies may be caused by several intrinsic factors including age, body weight, and nutrition. The extrinsic factors are often related to sports and include excessive forces or loading, poor training techniques, and environmental conditions.^[23]

Healing[link]

The tendons in the foot are highly complex and intricate. If any tendons break, the healing process is long and painful, not to mention the intricacy of the repairing (if fully severed) process. Most people who do not receive medical attention within the first 48 hours of the injury will suffer from severe swelling, pain, and an on-fire feeling where the injury occurred. They are very painful when they are inflamed or not in use.

It was believed previously that tendons could not undergo matrix turnover and that tenocytes were not capable of repair. However, it has been shown more recently that, throughout the lifetime of a person, tenocytes in the tendon actively synthesize ECM components as well as enzymes such as matrix metalloproteinases (MMPs) can degrade the matrix.^[23] Tendons are capable of healing and recovering from injuries in a process that is controlled by the tenocytes and their surrounding extracellular matrix. However, the healed tendons never regain the same mechanical properties as they had before the injury.

The three main stages of tendon healing are inflammation, repair or proliferation, and remodeling, which can be further divided into consolidation and maturation. These stages can overlap with each other. In the first stage, inflammatory cells such as neutrophils are recruited to the injury site, along with erythrocytes. Monocytes and macrophages are recruited within the first 24 hours, and phagocytosis of necrotic materials at the injury site occurs. After the release of vasoactive and chemotactic factors, angiogenesis and the proliferation of tenocytes are initiated. Tenocytes then move into the site and start to synthesize collagen III.^[20][22] The inflammation stage usually lasts for a few days, and the repair or proliferation stage then begins. In this stage, which lasts for about six weeks, the tenocytes are involved in the synthesis of large amounts of collagen and proteoglycans at the site of injury, and the levels of GAG and water are high.^[24] After about six weeks, the remodeling stage begins. The first part of the remodeling stage is consolidation, which lasts from about six to ten weeks after the injury. During this time, the synthesis of collagen and GAGs is decreased, and the cellularity is also decreased as the tissue becomes more fibrous as a result of increased production of collagen I and the fibrils become aligned in the direction of mechanical stress.^[22] The final maturation stage occurs after ten weeks, and during this time there is an increase in crosslinking of the collagen fibrils, which causes the tissue to become stiffer. Gradually, over a time period of about one year, the tissue will turn from fibrous to scar-like.^[24]

Matrix metalloproteinases or MMPs have a very important role in the degradation and remodeling of the ECM during the healing process after a tendon injury. Certain MMPs including MMP-1, MMP-2, MMP-8, MMP-13, and MMP-14 have collagenase activity, meaning that, unlike many other enzymes, they are capable of degrading collagen I fibrils. The degradation of the collagen fibrils by MMP-1 along with the presence of denatured collagen are factors that are believed to cause weakening of the tendon ECM and an increase in the potential for another rupture to occur.^[25] In response to repeated mechanical loading or injury, cytokines may be released by tenocytes and can induce the release of MMPs, causing degradation of the ECM and leading to recurring injury and chronic tendinopathies.^[22]

A variety of other molecules are involved in tendon repair and regeneration. There are five growth factors that have been shown to be significantly upregulated and active during tendon healing: insulin-like growth factor 1 (IGF-I), platelet-derived growth factor (PDGF), vascular endothelial growth factor (VEGF), basic fibroblast growth factor (bFGF), and transforming growth factor beta (TGF-β).^[24] These growth factors all have different roles during the healing process. IGF-1 increases collagen and proteoglycan production during the first stage of inflammation, and PDGF is also present during the early stages after injury and promotes the synthesis of other growth factors along with the synthesis of DNA and the proliferation of tendon cells.^[24] The three isoforms of TGF-β (TGF-β1, TGF-β2, TGF-β3) are known to play a role in wound healing and scar formation.^[26] VEGF is well known to promote angiogenesis and to induce endothelial cell proliferation and migration, and VEGF mRNA has been shown to be expressed at the site of tendon injuries along with collagen I mRNA.^[27] Bone morphogenetic proteins (BMPs) are a subgroup of TGF-β superfamily that can induce bone and cartilage formation as well as tissue differentiation, and BMP-12 specifically has been shown to influence formation and differentiation of tendon tissue and to promote fibrogenesis.

Effects of activity on healing[link]

In animal models, extensive studies have been conducted to investigate the effects of mechanical strain in the form of activity level on tendon injury and healing. While stretching can disrupt healing during the initial inflammatory phase, it has been shown that controlled movement of the tendons after about one week following an acute injury can help to promote the synthesis of collagen by the tenocytes, leading to increased tensile strength and diameter of the healed tendons and fewer adhesions than tendons that are immobilized. In chronic tendon injuries, mechanical loading has also been shown to stimulate fibroblast proliferation and collagen synthesis along with collagen realignment, all of which promote repair and remodeling.^[24] To further support the theory that movement and activity assist in tendon healing, it has been shown that immobilization of the tendons after injury often has a negative effect on healing. In rabbits, collagen fascicles that are immobilized have shown decreased tensile strength, and immobilization also results in lower amounts of water, proteoglycans, and collagen crosslinks in the tendons.^[20]

Several mechanotransduction mechanisms have been proposed as reasons for the response of tenocytes to mechanical force that enable them to alter their gene expression, protein synthesis, and cell phenotype, and eventually cause changes in tendon structure. A major factor is mechanical deformation of the extracellular matrix, which can affect the actin cytoskeleton and therefore affect cell shape, motility, and function. Mechanical forces can be transmitted by focal adhesion sites, integrins, and cell-cell junctions. Changes in the actin cytoskeleton can activate integrins, which mediate “outside-in” and “inside-out” signaling between the cell and the matrix. G-proteins, which induce intracellular signaling cascades, may also be important, and ion channels are activated by stretching to allow ions such as calcium, sodium, or potassium to enter the cell.^[24]

Ossified tendons[link]

In some organisms, notable ones being birds^[28] and ornithischian dinosaurs,^[29] portions of the tendon can become ossified. In this process, osteocytes inflitrate the tendon and lay down bone as they would in sesamoid bone such as the patella. In birds, tendon ossification primarily occurs in the hindlimb, while in ornithischian dinosaurs, ossified axial muscle tendons form a latticework along the neural and haemal spines on the tail, presumably for support.

Uses of sinew[link]

Sinew was widely used throughout pre-industrial eras as a tough, durable fiber. Some specific uses include using sinew as thread for sewing, attaching feathers to arrows (see fletch), lashing tool blades to shafts, etc. It is also recommended in survival guides as a material from which strong cordage can be made for items like traps or living structures. Tendon must be treated in specific ways to function usefully for these purposes. Inuit and other circumpolar people utilized sinew as the only cordage for all domestic purposes due to the lack of other suitable fiber sources in their ecological habitats. The elastic properties of particular sinews were also used in composite recurved bows favoured by the steppe nomads of Eurasia. The first stone throwing artillery also used the elastic properties of sinew.

Sinew makes for an excellent cordage material for three reasons: It is incredibly strong, it contains natural glues, and it shrinks as it dries, doing away with the need for knots.

Tendon (in particular, beef tendon) is used as a food in some Asian cuisines (often served at Yum Cha or Dim Sum restaurants). One popular dish is Suan Bao Niu Jin, where the tendon is marinated in garlic. It is also sometimes found in the Vietnamese noodle dish phở.

See also[link]

• Aponeurosis
• Chordae tendineae
• Cartilage
• Tendon sheath

References[link]

v t e Fibers Natural Animal Alpaca Angora Byssus Camel hair Cashmere Catgut Chiengora Guanaco Llama Mohair Pashmina Qiviut Rabbit Silk Sinew Spider silk Wool Vicuña Yak Vegetable Abacá Bagasse Bamboo Coir Cotton Flax Linen Hemp Jute Kapok Kenaf Piña Raffia Ramie Sisal Wood Mineral Asbestos Synthetic Cellulose Acetate Triacetate Art silk Bamboo Lyocell Rayon Modal Rayon Rayon Mineral Glass Carbon Tenax Basalt Metallic Polymer Acrylic Aramid Twaron Kevlar Technora Nomex Microfiber Modacrylic Nylon Olefin Polyester Polyethylene Dyneema Spectra Spandex Vinylon Vinyon Zylon

Kobe Bryant

Bryant greeting some fans in February 2007
No. 24 – Los Angeles Lakers
Shooting guard
Personal information
Born	(1978-08-23) August 23, 1978 (age 33) Philadelphia, Pennsylvania
Nationality	American
High school	Lower Merion HS, Ardmore, Pennsylvania
Listed height	6 ft 6 in (1.98 m)
Listed weight	205 lb (93 kg)
Career information
NBA Draft	1996 / Round: 1 / Pick: 13th overall
Selected by the Charlotte Hornets
Pro career	1996–present
Career history
1996–present	Los Angeles Lakers
Career highlights and awards
5× NBA Champion (2000, 2001, 2002, 2009, 2010) 2× NBA Finals MVP (2009–2010) NBA Most Valuable Player (2008) 14× NBA All-Star (1998, 2000–2012) 2× NBA scoring champion (2006–2007) 10× All-NBA First Team (2002–2004, 2006–2012) 2× All-NBA Second Team (2000–2001) 2× All-NBA Third Team (1999, 2005) 9× NBA All-Defensive First Team (2000, 2003–2004, 2006–2011) 3× NBA All-Defensive Second Team (2001–2002, 2012) NBA All-Rookie Second Team (1997) 4× NBA All-Star Game MVP (2002, 2007, 2009, 2011) NBA Slam Dunk Contest champion (1997) Naismith Prep Player of the Year (1996)
Stats at NBA.com
Medals Men's basketball Competitor for the  United States Olympic Games Gold 2008 Beijing National Team FIBA Americas Championship Gold 2007 Las Vegas Team competition

Kobe Bean Bryant (born August 23, 1978) is an American professional basketball player who plays shooting guard for the Los Angeles Lakers of the National Basketball Association (NBA). Bryant enjoyed a successful high school basketball career at Lower Merion High School, where he was recognized as the top high school basketball player in the country. He decided to declare his eligibility for the NBA Draft upon graduation, and was selected with the 13th overall pick in the 1996 NBA Draft by the Charlotte Hornets, then traded to the Los Angeles Lakers. As a rookie, Bryant earned himself a reputation as a high-flyer and a fan favorite by winning the 1997 Slam Dunk Contest.

Bryant and Shaquille O'Neal led the Lakers to three consecutive NBA championships from 2000 to 2002. A heated feud between the duo and a loss in the 2004 NBA Finals was followed by O'Neal's trade from the Lakers after the 2003–04 season. Following O'Neal's departure Bryant became the cornerstone of the Los Angeles Lakers franchise. He led the NBA in scoring during the 2005–06 and 2006–07 seasons, setting numerous scoring records in the process. In 2006, Bryant scored a career-high 81 points against the Toronto Raptors, the second most points scored in a single game in NBA history, second only to Wilt Chamberlain's 100-point game in 1962. He was awarded the regular season's Most Valuable Player Award (MVP) in 2008. After losing in the 2008 NBA Finals, Bryant led the Lakers to two consecutive championships in 2009 and 2010, earning the NBA Finals MVP Award on both occasions.

As of February 2012^[update], Bryant ranks third and fifth on the league's all-time post-season scoring and all-time regular season scoring lists, respectively. He is also the all-time leading scorer in Lakers franchise history. Since his second year in the league, Bryant has started in every NBA All-Star Game that has been held with fourteen All-Star appearances, winning the All-Star MVP Award four times (2002, 2007, 2009, and 2011). Bryant is tied for the most All Star MVP Awards in NBA history. He is a 14-time member of the All-NBA team and an 12-time member of the All-Defensive team; he is also the youngest player ever to receive defensive honors. At the 2008 Olympics, he won a gold medal as a member of the USA national team. In 2009, Sporting News and TNT named Bryant the top NBA player of the 2000s decade.

In 2003, Bryant was accused of sexual assault after having sex with a hotel employee in Colorado. In September 2004, prosecutors dropped the case after his accuser refused to testify. A civil suit was later filed and settled out of court.

Early years[link]

Childhood and youth[link]

Kobe Bryant was born in Philadelphia, Pennsylvania as the youngest of three children and the only son of former Philadelphia 76ers player and former Los Angeles Sparks head coach Joe "Jellybean" Bryant and Pamela Cox Bryant.^[1] He is also the maternal nephew of John "Chubby" Cox. His parents named him after the famous beef of Kobe, Japan, which they saw on a restaurant menu.^[1] Bryant was raised Roman Catholic.^[2] When Bryant was six, his father left the NBA and moved his family to Italy to continue playing professional basketball.^[3] Bryant became accustomed to his new lifestyle and learned to speak Italian and Spanish.^[3][4] During summers, he would come back to the United States to play in a basketball summer league.^[5]

Bryant started playing basketball when he was 3 years old,^[6] and his favorite team growing up was the Lakers.^[7] Bryant's grandfather would mail him videos of NBA games, which Bryant would study.^[7] At an early age he also learned to play soccer; his favorite team is AC Milan.^[8] He has said that if he had stayed in Italy, he would have tried to become a professional soccer player;^[8] Bryant is a big fan of former FC Barcelona manager Frank Rijkaard and their former player Ronaldinho.^[9] Upon Joe Bryant's retirement from playing basketball in 1991, the Bryant family moved back to the United States.

High school[link]

Bryant's retired No.33 jersey and banner at the Lower Merion High School gym.

Bryant earned national recognition during a spectacular high school career at Lower Merion High School located in the Philadelphia suburb of Lower Merion. As a freshman, he played for the varsity basketball team.^[10] His father coached him his second year of high school. Although during his first year the team was mediocre, the following three years the Aces compiled a 77–13 record, with Bryant playing all five positions.^[10] During his junior year, he averaged 31.1 points, 10.4 rebounds and 5.2 assists and was named Pennsylvania Player of the Year.^[11] College recruiters from across the country were lined up to recruit him after his breakout year.^[11] Duke, North Carolina, Villanova and Michigan were at the top of his list; however, when Kevin Garnett went in the first round of the 1995 NBA Draft, he began considering going directly to the pros.^[11]

At Adidas ABCD camp, Bryant earned the 1995 senior MVP award,^[12] while playing alongside future NBA teammate Lamar Odom.^[13] While in high school, then 76ers coach John Lucas invited Bryant to work out and scrimmage with the team, where he played one-on-one with Jerry Stackhouse.^[14] In his senior year of high school, Bryant led the Aces to their first state championship in 53 years. During the run, he averaged 30.8 points, 12 rebounds, 6.5 assists, 4.0 steals, and 3.8 blocked shots in leading the Aces to a 31–3 record.^[15] Bryant ended his high school career as Southeastern Pennsylvania's all-time leading scorer at 2,883 points, surpassing both Wilt Chamberlain and Lionel Simmons.^[16]

Bryant received several awards for his performance his senior year including being named Naismith High School Player of the Year, Gatorade Men's National Basketball Player of the Year, a McDonald's All-American, and a USA Today All-USA First Team player.^[17] Bryant's varsity coach, Greg Downer, commented that Bryant was "a complete player who dominates".^[15] In 1996, Bryant took R&B singer Brandy Norwood to his senior prom,^[18] though the two were, and remain, just friends. Ultimately, however, the 17-year-old Bryant made the decision to go directly into the NBA, only the sixth player in NBA history to do so.^[10] Bryant's news was met with a lot of publicity at a time when prep-to-pro NBA players were not very common (Garnett being the only exception in 20 years).^[10] His SAT score of 1080^[19] would have ensured his basketball scholarship to various top-tier colleges and Bryant has stated that had he decided to go to college after high school, he would have attended Duke University.^[20] In 2012, Bryant was honored as one of the 35 Greatest McDonald's All-Americans.^[21]

NBA career[link]

1996 NBA Draft[link]

The first guard to ever be taken out of high school, Bryant was chosen as the 13th overall draft pick by the Charlotte Hornets in 1996.^[22] According to Arn Tellem, Bryant's agent at the time, Bryant playing for the Charlotte Hornets was "an impossibility".^[23] However, Bill Branch, the Hornets' head scout at the time, said that the Hornets agreed to trade their draft selection to the Lakers before picking Bryant. The teams agreed to the trade the day before the draft and the Lakers did not tell the Hornets who to select until five minutes before the pick was made.^[24] Branch said that prior to the trade agreement, the Hornets never even considered drafting Bryant. Prior to the draft, Bryant had worked out in Los Angeles, in which he scrimmaged against former Lakers players Larry Drew and Michael Cooper, and according to then-Laker manager Jerry West "marched over these people".^[25] On July 1, 1996, West traded his starting center, Vlade Divac, to the Hornets in exchange for Bryant's draft rights.^[26] Since he was still 17 at the time of the draft, his parents had to cosign his contract with the Lakers until he was able to sign his own when he turned 18 before the season began.^[27]

First three seasons (1996–99)[link]

During his rookie season, Bryant mostly came off the bench behind guards Eddie Jones and Nick Van Exel.^[28] At the time he became the youngest player ever to play in an NBA game (a record since broken by Jermaine O'Neal and Andrew Bynum), and also became the youngest NBA starter ever.^[29] Initially, Bryant played limited minutes, but as the season continued, he began to see some more playing time. By the end of the season, he averaged 15.5 minutes a game. During the All-Star weekend, Bryant was the winner of the 1997 Slam Dunk Contest, becoming the youngest player to be named the slam dunk champion at the age of 18.^[30] Bryant's performance throughout the year earned him a spot on the NBA All Rookie second team with fellow bench teammate Travis Knight.^[31] His final minutes of the season ended in disaster when he shot 4 air balls at crucial times in the game.^[15] He first missed a jumper to win the game in the 4th quarter and 3 three-pointers in overtime (2 of which would have tied the game in the final minute). With that the Utah Jazz ended the playoffs for the Lakers in the second round. Shaquille O'Neal commented years later that "[Bryant] was the only guy who had the guts at the time to take shots like that."^[32][33]

In Bryant's second season, he received more playing time and began to show more of his abilities as a talented young guard. As a result Bryant's point averages more than doubled from 7.6 to 15.4 points per game.^[34] Bryant would see an increase in minutes when the Lakers "played small", which would feature Bryant playing small forward along side the guards he'd usually back up.^[35] Bryant was the runner-up for the NBA's Sixth Man of the Year Award,^[36] and through fan voting, he also became the youngest NBA All-Star starter in NBA history.^[37] He was joined by teammates Shaquille O'Neal, Nick Van Exel, and Eddie Jones, making it the first time since 1983 that four players on the same team were selected to play in the same All-Star Game. Bryant's 15.4 points per game was the highest of any non-starter in the season.^[38]

The 1998–99 season marked Bryant's emergence as a premiere guard in the league. With starting guards Nick Van Exel and Eddie Jones traded, Bryant started every game for the lockout-shortened 50 game season. During the season, Bryant signed a 6-year contract extension worth $70 million.^[38] This kept him with the Lakers until the end of the 2003–04 season. Even at an early stage of his career sportswriters were comparing his skills to that of Michael Jordan and Magic Johnson.^[27][39][40] The playoff results, however, were no better, as the Lakers were swept by the San Antonio Spurs in the Western Conference Semifinals.^[41]

Three-peat (1999–2002)[link]

Bryant was a member of the Lakers teams that won three consecutive NBA Championships from 2000 to 2002.

Bryant's fortunes would soon change when Phil Jackson became coach for the Los Angeles Lakers in 1999.^[42] After years of steady improvement, Bryant became one of the premier shooting guards in the league, earning appearances in the league's All-NBA,^[43] All-Star, and All-Defensive teams.^[44] The Los Angeles Lakers became true championship contenders under Bryant and Shaquille O'Neal, who formed a legendary center-guard combination. Jackson utilized the triangle offense he used to win six championships with the Chicago Bulls, which would help both Bryant and O'Neal rise to the elite class of the NBA. The three resulting championships won consecutively in 2000, 2001, and 2002 further proved such a fact.^[45]

Bryant started the 1999–2000 season sidelined for six weeks due to an injury to his hand in a preseason game against the Washington Wizards.^[46] With Bryant back and playing over 38 minutes a game, he saw an increase in all statistical categories in the 1999–2000 season. This included leading the team in assists per game and steals per game. The duo of O'Neal and Bryant backed with a strong bench led to the Lakers winning 67 games, tied for fifth-most in NBA history. This followed with O'Neal winning the MVP and Bryant being named to the All-NBA Team Second Team and All-NBA Defensive Team for the first time in his career (the youngest player ever to receive defensive honors).^[47] While playing second fiddle to O'Neal in the playoffs, Bryant had some clutch performances including a 25 point, 11 rebound, 7 assist, 4 block game in game 7 of the Western Conference finals against the Portland Trail Blazers.^[48] He also threw an alley-oop pass to O'Neal to clinch the game and the series. In the 2000 NBA Finals against the Indiana Pacers, Bryant injured his ankle in the second quarter of Game 2 and did not return to the game. He also missed Game 3 due to the injury. In Game 4, Bryant scored 22 points in the second half, and led the team to an OT victory as O'Neal fouled out of the game. Bryant scored the winning shot to put the Lakers ahead 120–118.^[49] With a 116–111 Game 6 victory, the Lakers won their first championship since 1988.^[50]

Statistically, the 2000–01 season saw Bryant perform similarly to the previous year, except Bryant averaged 6 more points a game (28.5). It was also the year when disagreements between Bryant and O'Neal began to surface.^[51] Once again he led the team in assists with 5 per game. The Lakers however, only won 56 games, an 11-game drop off from last year. The Lakers would respond by going 15–1 in the playoffs. They easily swept the Portland Trail Blazers, Sacramento Kings, and San Antonio Spurs, before losing their first game against the Philadelphia 76ers in OT. They would go on to win the next 4 games and bring their second championship to Los Angeles in as many seasons. During the playoffs, Bryant played heavy minutes which brought his stats up to 29.4 points, 7.3 rebounds, and 6.1 assists per game. In the playoffs, teammate O'Neal declared Bryant the best player in the league.^[15][52] Bryant ended up making the All NBA Second team and All NBA Defensive Team for the second year in a row. In addition, he was also voted to start in the NBA All-Star Game for the 3rd year in a row (no game in 1999).

In the 2001–02 season, Bryant played 80 games for the first time in his career. He continued his all-round play by averaging 25.2 points, 5.5 rebounds, and 5.5 assists per game. He also had a career high 46.9% shooting and once again led his team in assists. While making the All-Star team and All-NBA Defensive team again, he was also promoted to the All-NBA First Team for the first time in his career. The Lakers won 58 games that year and finished second place in the Pacific Division behind in-state rival Sacramento Kings. Bryant was suspended one game after he punched Reggie Miller of the Indiana Pacers after the Lakers' March 1, 2002 victory over the Pacers.^[53][54]

The road to the Finals would prove a lot tougher than the record run the Lakers had the previous year. While the Lakers swept the Blazers and defeated the Spurs 4–1, the Lakers did not have home court advantage against the Sacramento Kings. The series would stretch to 7 games, the first time this happened to the Lakers since the 2000 Western Conference Finals. However, the Lakers were able to beat their division rivals and make their third consecutive NBA Finals appearance. In the 2002 Finals, Bryant averaged 26.8 points, 51.4% shooting, 5.8 rebounds, 5.3 assists per game, which included scoring a quarter of the teams points.^[55] At age 23, Bryant became the youngest player to win three championships.^[55] Bryant's play was notable and praised for his performance in the 4th quarter of games, specifically the last 2 rounds of the playoffs.^[55][56] This cemented Bryant's reputation as a clutch player.

Coming up short (2002–04)[link]

Bryant prepares to shoot a free throw in 2005.

In the 2002–03 season, Bryant averaged 30 points per game and embarked on a historic run, posting 40 or more points in nine consecutive games while averaging 40.6 in the entire month of February. In addition, he averaged 6.9 rebounds, 5.9 assists, and 2.2 steals per game, all career highs up to that point. Bryant was once again voted on to both the All-NBA and All-Defensive 1st teams,^[1] and came in third place in voting for the MVP award. After finishing 50–32 in the regular season, the Lakers foundered in the playoffs and lost in the Western Conference semi-finals to the eventual NBA champions San Antonio Spurs in six games.^[57]

In the following 2003–04 season, the Lakers were able to acquire NBA All-Stars Karl Malone, and Gary Payton to make another push at the NBA Championship.^[58] Before the season began, Bryant was arrested for sexual assault.^[59] This caused Bryant to miss some games due to court appearances or attend court earlier in the day and travel to play games later in same day.^[60] In the final game of the regular season the Lakers played the Portland Trail Blazers. Bryant made two buzzer beaters to win the game and the Pacific Division title. At the end of the fourth quarter, Bryant made a 3-pointer with 1.1 seconds left to tie the game at 87 and send it into OT.^[61] The game eventually went to a second overtime, in which Bryant made another 3-pointer as time expired to lift the Lakers past the Blazers 105–104.^[61]

With a starting lineup of four future Hall of Famers, O'Neal, Malone, Payton, and Bryant, the Lakers were able to reach the NBA Finals.^[62] In the Finals, they were defeated in five games by the Detroit Pistons, who won their first championship since 1990.^[63] In that series, Bryant averaged 22.6 points per game and 4.4 assists. He shot a mere 35.1% from the field.^[64] Phil Jackson's contract as coach was not renewed, and Rudy Tomjanovich took over.^[65] Shaquille O'Neal was traded to the Miami Heat for Lamar Odom, Caron Butler, and Brian Grant.^[66] The following day, Bryant declined an offer to sign with the Los Angeles Clippers and re-signed with the Lakers on a seven-year contract.^[67]

Setting records and playoffs disappointments (2004–07)[link]

Bryant dunks against Golden State Warriors in October 2005

Bryant was closely scrutinized and criticized during the 2004–05 season with his reputation badly damaged from all that had happened over the previous year. A particularly damaging salvo came when Phil Jackson wrote The Last Season: A Team in Search of Its Soul. The book detailed the events of the Lakers' tumultuous 2003–04 season and has a number of criticisms of Bryant. In the book Jackson called Bryant "uncoachable".^[68] Midway through the season, Rudy Tomjanovich suddenly resigned as Lakers coach, citing the recurrence of health problems and exhaustion.^[69] Without Tomjanovich, stewardship of the remainder of the Lakers' season fell to career assistant coach Frank Hamblen.^[70] Despite the fact that Bryant was the league's second leading scorer at 27.6 points per game, the Lakers floundered and missed the playoffs for the first time in over a decade. The year signified a drop in Bryant's overall status in the NBA, as he did not make the NBA All-Defensive Team and was also demoted to the All-NBA Third Team.^[71] During the season, Bryant also engaged in public feuds with Ray Allen and Karl Malone.^[72][73]

The 2005–06 NBA season would mark a crossroads in Bryant's basketball career. Despite past differences with Bryant, Phil Jackson returned to coach the Lakers.^[74] Bryant endorsed the move, and by all appearances, the two men worked together well the second time around, leading the Lakers back into the playoffs. Bryant's individual scoring accomplishments posted resulted in the finest statistical season of his career. On December 20, 2005, Bryant scored 62 points in three quarters against the Dallas Mavericks. Entering the fourth quarter, Bryant outscored the entire Mavericks team 62–61, the only time a player has done this through three quarters since the introduction of the shot clock.^[75] When the Lakers faced the Miami Heat on January 16, 2006, Bryant and Shaquille O'Neal made headlines by engaging in handshakes and hugs before the game, signifying a change in the feud that had festered between them.^[76] A month later, at the 2006 NBA All-Star Game, the two were seen laughing together.^[77]

Bryant scored a career high of 81-points against the Toronto Raptors in Staples Center, second highest single scoring performance in NBA history, surpassed only by Wilt Chamberlain's 100-point game in 1962.

On January 22, 2006, Bryant scored a career-high 81 points in a victory against the Toronto Raptors.^[78][79] In addition to breaking the previous franchise record of 71 set by Elgin Baylor, Bryant's 81-point game was the second highest point total in NBA history, surpassed only by Wilt Chamberlain's 100-point game in 1962.^[80] In that same month, Bryant also became the first player since 1964 to score 45 points or more in four consecutive games, joining Chamberlain and Baylor as the only players ever to do so.^[81] For the month of January, Bryant averaged 43.4 points per game,^[82] the eighth highest single month scoring average in NBA history and highest for any player other than Chamberlain.^[83] By the end of the 2005–06 season, Bryant set Lakers single-season franchise records for most 40-point games (27) and most points scored (2,832).^[84] He won the league's scoring title for the first time by averaging 35.4 points per game. Bryant finished in fourth place in the voting for the 2006 NBA Most Valuable Player Award, but received 22 first place votes—second only to winner Steve Nash.^[85] The Los Angeles Lakers posted a 45–37 record, an eleven-game improvement over the previous season, and the entire squad seemed to be clicking.^[86]

Later in the season, it was reported that Bryant would change his jersey number from 8 to 24 at the start of the 2006–07 NBA season. Bryant's first high school number was 24 before he switched to 33.^[87] After the Lakers' season ended, Bryant said on TNT that he wanted 24 as a rookie, but it was unavailable, as was 33, retired with Kareem Abdul-Jabbar. Bryant wore 143 at the Adidas ABCD camp, and chose 8 by adding those numbers.^[87] In the first round of the playoffs, the Lakers played well enough to reach a 3–1 series lead over the Phoenix Suns, culminating with Bryant's OT-forcing and game-winning shots in Game 4. They came within six seconds of eliminating the second-seeded Suns in Game 6, however, they lost that game 126–118 in overtime.^[88] Despite Bryant's 27.9 points per game in the series, the Lakers broke down, and ultimately fell to the Suns in seven games.^[88] Bryant received criticism for only taking three shots in the second half of the 121–90 Game 7 loss to Phoenix.^[89] In the 2006 off-season, Bryant had knee surgery, preventing him from participating in the 2006 FIBA World Championship tournament.^[90]

Bryant scored 50 points or more in four consecutive games and ten total in the 2006–07 season.

During the 2006–07 season, Bryant was selected to his 9th All-Star Game appearance, and on February 18, he logged 31 points, 6 assists, and 6 steals, earning his second career All-Star Game MVP trophy.^[91] Over the course of the season, Bryant became involved in a number of on court incidents. On January 28 while attempting to draw contact on a potential game winning jumpshot, he flailed his arm, striking San Antonio Spurs guard Manu Ginóbili in the face with his elbow.^[92] Following a league review, Bryant was suspended for the subsequent game at Madison Square Garden against the New York Knicks. The basis given for the suspension was that Bryant had performed an "unnatural motion" in swinging his arm backwards.^[93] Later, on March 6, he seemed to repeat the motion, this time striking Minnesota Timberwolves guard Marko Jarić.^[92] On March 7, the NBA handed Bryant his second one-game suspension.^[94] In his first game back on March 9, he elbowed Kyle Korver in the face which was retroactively re-classified as a Type 1 flagrant foul.^[92]

On March 16, Bryant scored a season-high 65 points in a home game against the Portland Trail Blazers, which helped end the Lakers 7-game losing streak. This was the second best scoring performance of his 11-year career.^[95] The following game, Bryant recorded 50 points against the Minnesota Timberwolves,^[96] after which he scored 60 points in a road win against the Memphis Grizzlies—becoming the second Laker to score three straight 50-plus point games, a feat not seen since Michael Jordan last did it in 1987.^[97] The only other Laker to do so was Elgin Baylor, who also scored 50+ in three consecutive contests in December 1962.^[97] In the following day, in a game against the New Orleans Hornets, Bryant scored 50 points, making him the second player in NBA history to have 4 straight 50 point games behind Wilt Chamberlain, who is the all-time leader with seven consecutive 50 point games twice.^[98] Bryant finished the year with a total of ten 50-plus point games,^[99] becoming the only player beside Wilt Chamberlain in 1961–62 and 1962–63 to do so in one season. He also won his second straight scoring title that season.^[100] Throughout the 2006–07 season, Bryant's jersey became the top selling NBA jersey in the United States and China.^[101] A number of journalists have attributed the improved sales to Bryant's new number, as well as his continuing All-Star performance on the court.^[102][103] In the 2007 NBA Playoffs, the Lakers were once again eliminated in the first round by the Phoenix Suns, 4–1.^[104]

MVP year and trip to the finals (2007–08)[link]

On May 27, 2007, ESPN reported that Bryant stated that he wanted to be traded if Jerry West did not return to the team with full authority.^[105] Bryant later confirmed his desire for West's return to the franchise, but denied stating that he would want to be traded if that does not occur.^[106] However, three days later, on Stephen A. Smith's radio program, Bryant expressed anger over a Lakers "insider" who claimed that Bryant was responsible for Shaquille O'Neal's departure from the team, and publicly stated, "I want to be traded."^[107] Three hours after making that statement, Bryant stated in another interview that after having a conversation with head coach Phil Jackson, he has reconsidered his decision and backed off his trade request.^[108] Bryant would later be shown on an infamous amateur video saying that center Andrew Bynum should have been traded for All-Star Jason Kidd.^[109][110]

Bryant's Lakers lost to the Boston Celtics in 6 games during the 2008 NBA Finals.

On December 23, 2007, Bryant became the youngest player (29 years, 122 days) to reach 20,000 points, in a game against the New York Knicks, in Madison Square Garden.^[111] Despite an injury to his shooting hand's small finger, described as "a complete tear of the radial collateral ligament, an avulsion fracture, and a volar plate injury at the MCP joint" that occurred in a game on February 5, 2008, Bryant played all 82 games of the regular season instead of opting for surgery. Regarding his injury, he stated, "I would prefer to delay any surgical procedure until after our Lakers season, and this summer's Olympic Games. But, this is an injury that myself [sic] and the Lakers' medical staff will just have to continue to monitor on a day-to-day basis."^[112] In early September 2008, Bryant decided not to have surgery to repair the injury.^[113]

Leading his team to a West best 57–25 record, they swept the Nuggets in the first round and on May 6, 2008, Bryant was officially announced as the NBA Most Valuable Player award, his first for his career.^[114] He said, "It's been a long ride. I'm very proud to represent this organization, to represent this city."^[115] Jerry West, who was responsible for bringing Bryant to the Lakers, was on hand at the press conference to observe Bryant receive his MVP trophy from NBA commissioner David Stern. He stated, "Kobe deserved it. He's had just another great season. Doesn't surprise me one bit."^[116] In addition to winning his MVP award, Bryant was the only unanimous selection to the All-NBA team on May 8, 2008 for the third straight season and sixth time in his career.^[117] He would then headline the NBA All-Defensive First Team with Kevin Garnett, receiving 52 points overall including 24 first-place nods, earning his eighth selection.^[118]

The Lakers concluded the 2007–08 regular season with a 57–25 record, finishing first in the Western Conference and setting up themselves for a first-round contest against the Nuggets. In Game 1, Bryant, who said he made himself a decoy through most of the game, scored 18 of his 32 points in the final 8 minutes to keep Los Angeles safely ahead.^[119] That made Denver the first 50-win team to be swept out of the first round of the playoffs since the Memphis Grizzlies fell in four to the San Antonio Spurs in 2004.^[120] In the first game of the next round against the Jazz, Bryant scored 38 points as the Lakers beat the Jazz in Game 1.^[121] The Lakers won the next game as well, but dropped Games 3 and 4, even with Bryant putting up 33.5 points per game.^[122] The Lakers then won the next two games to win the semifinals in 6.^[122] This set up a Western Conference Finals berth against the San Antonio Spurs. The Lakers defeated the Spurs in 5 games, sending themselves to the NBA Finals against the Boston Celtics. This marked the fifth time in Bryant's career and the first time without Shaquille O'Neal to go to the NBA Finals.^[123] The Lakers then lost to the Boston Celtics in 6 games.^[124]

Back on top (2008–10)[link]

Bryant set a Madison Square Garden record with 61 points

In the 2008–09 season, the Lakers opened the campaign by winning their first seven games.^[125] Bryant led the team to tie the franchise record for most wins to start the season going 17–2,^[126] and by the middle of December they compiled a 21–3 record. He was selected to his eleventh consecutive All-Star Game as a starter,^[127] and was named the Western Conference Player of the Month for December and January in addition to being named Western Conference Player of the week three times.^[128] In a game against the Knicks on February 2, 2009, Bryant scored 61 points, setting a record for the most points scored at Madison Square Garden.^[129] During the 2009 NBA All-Star Game, Bryant who tallied 27 points, 4 assists, 4 rebounds, and 4 steals was awarded All-Star Game co-MVP with former teammate Shaquille O'Neal.^[130] The Lakers finished the regular season with the best record in the west with a 65–17 record. Bryant was runner-up in the MVP voting behind LeBron James,^[131] and was selected to the All-NBA First Team and All-Defensive First Team for the seventh time in his career.

Bryant at the championship parade of the 2009 NBA Champions Los Angeles Lakers

In the playoffs, the Lakers defeated the Utah Jazz in five games and the Houston Rockets in seven games in the opening two rounds. After finishing off the Denver Nuggets in the Conference Finals in six games, the Lakers earned their second straight trip to the NBA Finals where they defeated the Orlando Magic in five games. Bryant was awarded his first NBA Finals MVP trophy upon winning his fourth championship,^[132] achieving series averages: 32.4 points, 7.4 assists, 5.6 rebounds, 1.4 steals and 1.4 blocks.^[133] He became the first player since Jerry West in the 1969 NBA Finals to average at least 32.4 points and 7.4 assists for a finals series^[134] and the first since Michael Jordan to average 30 points, 5 rebounds and 5 assists for a title-winning team in the finals.^[135]

Bryant shoots a left-handed floater over Dwight Howard of the Orlando Magic on January 18, 2010

During the 2009–10 season, Bryant made six game-winning shots including a buzzer-beating, one-legged 3-pointer against the Miami Heat on December 4, 2009.^[136] Bryant considered the shot one of the luckiest he has made.^[136] A week later, Bryant suffered an avulsion fracture in his right index finger in a game against the Minnesota Timberwolves.^[137] Despite the injury, Bryant elected to continue playing with it, rather than take any time off to rest the injury.^[137] Five days after his finger injury, he made another game winning shot, after missing on an opportunity in regulation, this time against the Milwaukee Bucks in an overtime game.^[138] Bryant also became the youngest player (31 years, 151 days) to reach 25,000 points during the season, surpassing Wilt Chamberlain.^[139] He continued his dominant clutch plays making yet another game-winning three-pointer against the Sacramento Kings,^[140] and what would be the game-winning field goal against the Boston Celtics.^[141] The following day, he surpassed Jerry West to become the all-time leading scorer in Lakers franchise history.^[142] After being sidelined for five games from an ankle injury, Bryant made his return and made another clutch three-pointer to give the Lakers a one point lead with four seconds remaining against the Memphis Grizzlies.^[143] Two weeks later, he made his sixth game-winning shot of the season against the Toronto Raptors.^[144]