UFC 29: Defense of the Belts was a mixed martial arts event held by the Ultimate Fighting Championship on December 16, 2000 at Differ Ariake Arena in Tokyo, Japan.

The event was the last UFC to be held in Japan until the UFC visited the country again during UFC 144, and the last event to be promoted by "UFC-J", the UFC's Japanese counterpart. As the name implies, the card featured two title defenses, featuring Light Heavyweight Champion Tito Ortiz, and Lightweight Champion Pat Miletich.

UFC 29 is notable for featuring one of the few UFC losses by future longtime Welterweight Champion Matt Hughes, who was submitted in just 20 seconds by Dennis Hallman. The event also featured the first televised UFC appearance of Olympic silver medalist Matt Lindland. It was also the first UFC card to have music played inbetween rounds, and a different theme than the standard UFC entrance theme. A local ring announcer was used instead of the usual Bruce Buffer.

UFC 29 was the seventh straight UFC event to have never seen a home video or DVD release, as their parent company SEG was nearing bankruptcy. UFC 29 was the last UFC event held by SEG, and following UFC 29, in January 2001, SEG sold the UFC to current owners Zuffa LLC.

Anderson da Silva (Portuguese pronunciation: [ˈɐ̃deʁsõ ˈsiwvɐ]; born April 14, 1975) is a Brazilian mixed martial artist. He is the current UFC Middleweight Champion and the promotion's longest reigning champion. With 14 consecutive wins and 9 title defenses, Silva holds the longest winning streak and title defense streak in UFC history.

Silva is ranked as the number one Middleweight in the world by multiple publications, and is the consensus No. 1 pound-for-pound fighter in the world according to ESPN, Sherdog, Yahoo! Sports, MMAFighting.com and other publications. UFC president Dana White has proclaimed Silva as "the greatest mixed martial artist ever."^{[undue weight? – discuss]} Silva is also the last Cage Rage Middleweight Champion and a former Shooto Middleweight Champion. Besides the UFC and Cage Rage, Silva has fought for a number of other MMA promotions including the Pride Fighting Championships, Shooto and Rumble on the Rock.

Although known primarily for his mastery of Muay Thai striking, Silva is also a Brazilian Jiu-Jitsu blackbelt, a rank he earned in 2006 from Antônio Rodrigo Nogueira who follows Gracie Lineage through Carlson Gracie, like Murilo Bustamante and the Brazilian Top Team. He began martial arts training at the age of 14, training Tae kwon do and earning a black belt by the age of 18. He is also a black belt in Judo and a yellow rope in Capoeira.

Brock Edward Lesnar (/ˈlɛznər/; born July 12, 1977) is an American professional wrestler, actor, former mixed martial artist and amateur wrestler, signed with WWE and appearing on its Raw brand. He is also a former UFC Heavyweight Champion and former #1 ranked mixed martial arts (MMA) Heavyweight by Sherdog; he was ranked #5 before he announced his retirement at the end of 2011. Lesnar is an accomplished amateur wrestler, winning the 2000 NCAA heavyweight wrestling championship and placing second in 1999, losing in the finals to 1999 world freestyle wrestling champion and future New England Patriots offensive lineman Stephen Neal.

He gained prominence in World Wrestling Entertainment (WWE) from 2002 to 2004, where he is a former three-time WWE Champion, becoming the youngest WWE Champion at age 25 with his first reign. Lesnar was the 2002 King of the Ring and the winner of the 2003 Royal Rumble. After leaving WWE, Lesnar pursued a career in the NFL. He played during the preseason for the Minnesota Vikings, but ended up being a late cut. Lesnar returned to professional wrestling at the end of 2005, and joined New Japan Pro Wrestling (NJPW), where he won the IWGP Heavyweight Championship in his first match. He was officially stripped of the title by NJPW in July 2006, and took the physical belt with him to Inoki Genome Federation (IGF), where he was still recognized as IWGP Champion until June 2007.

Chris Weidman (born June 17, 1984) is an American mixed martial artist and former collegiate wrestler. He is currently signed as a Middleweight with the UFC. Weidman attended Baldwin high school on Long Island where he was a Nassau County and New York State wrestling Champion. Weidman earned All-American wrestling honors at NCC before transferring to Hofstra where he became a Two-Time Division I All-American, placing 3rd at the NCAA tournament his senior year. Weidman graduated from Hofstra University with a Bachelor's Degree in Psychology.

Weidman trains and competes as part of the Serra-Longo Fight Team under the tutelage of Ray Longo and Matt Serra; Weidman currently competes in the middleweight division. In just his 3rd fight, Weidman fought a highly touted Uriah Hall for the Ring of Combat middleweight title in what was billed as a striker vs wrestler matchup; Weidman showed his striking prowess by knocking Hall out in dramatic fashion. Weidman qualified for and competed at the 2009 ADCC Submission Wrestling World Championship (with just 1 year of formal Jiu-Jitsu training) in Barcelona where he lost to world renowned Jiu-Jitsu practitioner André Galvão. As of 2010, multiple MMA ranking panels had Weidman ranked as high as the #1 ranked prospect in the world at 185 lbs. Weidman was also listed as the number one prospect in all of MMA in the 2011 Top 50 Prospects piece put out by MMARanked.com

Mark Thomas Pavelich (born February 28, 1958 in Eveleth, Minnesota) is a retired US professional ice hockey forward who played 355 regular season games in the NHL for the New York Rangers, Minnesota North Stars and San Jose Sharks between 1981 and 1992 and was a member of the 1980 U.S. Olympic hockey team that won the gold medal in what has been called the Miracle on Ice.

The son of Croatian immigrants, Pavelich grew up in rural Minnesota. He attended the University of Minnesota Duluth as an amateur player for three seasons in 1977–79. Pavelich is best known for being a member of the Miracle on Ice, the 1980 U.S. Olympic hockey gold medal team. He got the only assist on the game winning goal by Mike Eruzione.

After the Olympics, Pavelich (who was never drafted by an NHL team) played one season for HC Lugano in Switzerland where he scored 73 Points in 60 games. He also returned to the US national team for the 1981 Ice Hockey World Championship tournament. He was brought back to the United States the following year by his former US Olympic coaches Herb Brooks and Craig Patrick, who had assumed control of the New York Rangers since the 1980 Olympics. Despite his small size, Pavelich initially thrived in his role as a quick playmaking centre for the Rangers (he still holds the Ranger record for most points as a rookie(76)). However, his career in New York was ended by a feud with Brooks' successor Ted Sator who introduced a traditional North American dump-and-chase style of play. Pavelich balked at the lack of effectiveness and disorder brought on by the changes.