Justin Gatlin (born February 10, 1982) is an American sprinter. He is an Olympic gold medalist, with a 100 m personal best of 9.85 seconds and two-time World indoor champion in the 60-meter dash. He served a four-year ban from track and field for testing positive for a banned substance; Gatlin had appealed the ban in 2009, but it was later denied.

Gatlin attended Woodham High School in Pensacola, Florida.

In the fall of 2000, Gatlin arrived at University of Tennessee, Knoxville, as a good high school 110 m hurdler. During high school, Justin was recruited for track by coaches Vince Anderson and Bill Webb who quickly realized his potential and turned him into a sprinter. After training and competing in UT's program for two years under the guidance of former Tennessee assistant Vince Anderson, Gatlin won six consecutive NCAA titles. In the fall of 2002, Gatlin left Tennessee after his sophomore season to join the professional ranks. Just two years later, he won the gold medal in the 100 m (9.85 s) at the 2004 Summer Olympics, narrowly beating Francis Obikwelu of Portugal and the defending champion Maurice Greene. He also won a bronze medal in a USA sweep of the 200 m race, and a silver medal as a member of the 4 x 100 m relay squad. In the 2005 World Athletics Championships in Helsinki, he again triumphed over 2003 champion Kim Collins, capturing the gold medal in the 100 m.

Tyson Gay (born August 9, 1982) is an American track and field sprinter. His primary events are the 100 meters and 200 meters. His personal bests establish him as the second fastest athlete in the 100 meters and the fifth fastest athlete in the history of the 200 meters, with times of 9.69 (which is a United States record) and 19.58 seconds respectively.

Gay has won numerous medals in major international competitions, including a gold medal sweep of the 100 m, 200 m and 4 x 100 meters relay at the 2007 Osaka World Championships. This made Gay the second sprinter to win all three events at the same World Championships, after Maurice Greene.

At the same meet, Gay suffered a severe hamstring injury in the 200 m event. The injury persisted and this contributed to his failure to win a single medal at the Beijing Olympics. As a participant in the US Anti-Doping Agency's "Project Believe" program, Gay is regularly tested to ensure that his system is clean of performance-enhancing drugs.

Gay also holds the record for the fastest non-winning time for the 100 meters. In August 2009, he ran 9.71 seconds in the World Athletics Championships from Berlin, Germany. Tyson Gay remains the only sprinter to have defeated Usain Bolt in a final since Bolt made his first world record run. Gay ran a wind assisted 9.68 at the 2008 US Olympic trials.

The Honourable Usain St. Leo Bolt, OJ, C.D. ( /ˈjuːseɪn/; born 21 August 1986), is a Jamaican sprinter and a five-time World and three-time Olympic gold medalist. He is the world record and Olympic record holder in the 100 metres, the 200 metres and (along with his teammates) the 4×100 metres relay. He is the reigning Olympic champion in these three events, and is one of only seven athletes (along with Valerie Adams, Veronica Campbell-Brown, Jacques Freitag, Yelena Isinbayeva, Jana Pittman, Dani Samuels) to win world championships at the youth, junior, and senior level of an athletic event.

Bolt won a 200 m gold medal at the 2002 World Junior Championships, making him the competition's youngest-ever gold medalist at the time (since surpassed by Jacko Gill). In 2004, at the CARIFTA Games, he became the first junior sprinter to run the 200 m in less than 20 seconds with a time of 19.93 s, breaking the previous world junior record held by Roy Martin by two-tenths of a second. He turned professional in 2004, and although he competed at the 2004 Summer Olympics, he missed most of the next two seasons due to injuries. In 2007, he broke Don Quarrie's 200 m Jamaican record with a run of 19.75 s.

Nickel Ashmeade (born April 7, 1990) is a Jamaican sprinter who specialises in the 100 and 200 meters.

Ashmeade first enjoyed success in the sprints as a junior athlete: at the 2006 Central American and Caribbean Junior Championships he beat compatriot Dexter Lee to the 100 m title, was runner-up to Ramone McKenzie over 200 m, and teamed up with the pair to bring Jamaica the 4×100 meter relay title. Another medal haul came for the young Jamaican at the 2007 World Youth Championships in Athletics, where he was second to Lee in the 100 m, ran a 200 m best of 20.76 seconds for the bronze medal, and helped the national team to another bronze in the sprint medley relay. He competed at the Penn Relays in 2008 and represented his school, St. Jago High School – an institution renowned for producing track and field athletes.

Ashmeade focused on the 200 m at the 2008 World Junior Championships in Athletics and he took the silver medal, narrowly finishing behind France's Christophe Lemaitre. A second silver came in the 4×100 m relay and he departed from his usual oeuvre to help Jamaica to fourth place in the 4×400 m relay. The regional CARIFTA Games provided him the opportunity for further junior medals: he won the 200 m title and two relay gold medals at the 2008 edition and almost repeated the feat in 2009, with the sole difference being a 4×400 m relay silver. His final international outing as a junior athlete came at the 2009 Pan American Junior Athletics Championships in Port of Spain and he won the 200 m gold in a personal best of 20.40 seconds before going on to take a relay bronze medal.

Christophe Lemaitre (French pronunciation: [kʁistɔf ləmɛtʁ]; born 11 June 1990 in Annecy, France) is a French sprinter, who specialises in the 100 and 200 metres. He is the French 100 m and 200 m record holder with a time of 9.92 seconds and 19.80 seconds as well as being the first caucasian to break the 10-second barrier in an officially timed event.

At the age of 20, he won the 100 m, 200 m and the 4×100 m relay titles at the 2010 European Championships, the first sprinter ever to do this treble, making him the fastest man in Europe.

Lemaitre grew up in the town of Culoz, where he practiced handball, rugby and football, before his speed was discovered. In 2005 at the age of 15, during national sprinting events, Lemaitre ended up with the fastest 50 metres in the country. A month after his 16th birthday in 2006, and less than a year after joining an athletics club at Aix-les-Bains, Lemaitre ran 100m in 10.96 seconds. His personal best improved to 10.53 seconds in 2007.

In 2008, he ran a new 100m personal best of 10.26 seconds. At the 2008 World Junior Championships in Athletics, Lemaitre won the 200 m title with a time of 20.83 seconds.