UFC 95: Sanchez vs. Stevenson was a mixed martial arts event held by the Ultimate Fighting Championship (UFC) on February 21, 2009 at The O₂ Arena in London, England. It was broadcast live for viewers in Europe and Canada and later tape delayed for U.S. viewers on Spike. The bout was headlined by season one and two winners of The Ultimate Fighter.

Fighters were awarded $40,000 bonuses.

As with UFC 91, every bout was aired on the broadcast due to the speed of the main card bouts.

UFC 95 drew an average of 2.4 million viewers on Spike TV.

Diego J. Sanchez (born December 31, 1981) is an American mixed martial artist (MMA) of Mexican descent, with a background in wrestling and Gaidojutsu, system of submission wrestling developed by his longtime trainer Greg Jackson. He currently fights as a welterweight with the Ultimate Fighting Championship (UFC). Sanchez is currently ranked as the #9 welterweight fighter in the world by MMAWeekly.

Sanchez was born in Albuquerque, New Mexico. He attended Del Norte High School, where he became a state champion wrestler.^{[citation needed]}

Diego Sanchez wrestled in New Mexico before starting training MMA while working for UPS. Sanchez eventually joined Jackson's Submission Fighting, still while working for UPS, managing the time between work and training. In 2002, he made his MMA debut for King of the Cage where he also later became a champion.

His UFC debut came when he was chosen as a participant on the first season of the reality show, The Ultimate Fighter. Presented as a young, focused middleweight who only had one goal, to become a UFC champion, he won a contract with the UFC after winning a fight against Kenny Florian, becoming the middleweight winner for the first season of the show. On the show, Sanchez was known for being the "odd-ball" of the group, practicing yoga at odd moments and trying to extract "energy" from a lightning storm, and was also a self-proclaimed "Zen master". Sanchez' last fight before his loss to Josh Koscheck was against Joe Riggs on December 13, 2006 at UFC Fight Night 7. Sanchez landed a right hook that knocked Riggs down, followed by a running knee that knocked Riggs out. Sanchez won at 1:45 of the first round, scoring the first UFC knockout of his career.

Joseph Christopher Stevenson (born June 15, 1982) is an American mixed martial artist fighting out of Hesperia, California. Competing as a welterweight, he won The Ultimate Fighter 2 welterweight tournament. Stevenson fought most of his UFC career as a lightweight, and made his featherweight debut at UFC Live: Kongo vs. Barry. Stevenson is noted for his effective use of the guillotine choke. 'Daddy' holds notable wins over Melvin Guillard, Yves Edwards, Nate Diaz, Spencer Fisher, Gleison Tibau, and Kurt Pellegrino. He holds an 8-8 record in the promotion.

Stevenson's father died from bone marrow cancer. Stevenson and his first wife, Lisa, have two sons, Joe Jr. and Tyler.

Stevenson and his second wife Maia have two sons, Frankie and Maximus.

He graduated in the class of 2000 from Silverado High School in Victorville, California.

Stevenson began wrestling at the age of 11 and started Jiu Jitsu at the age of 13. He moved to Las Vegas in 2004, and began training at Marc Laimon's Cobra Kai in Las Vegas. In March 2008, Stevenson opened his own school in his hometown of Victorville, California. "Joe Stevenson's Cobra Kai" teaches MMA as well as boxing, kickboxing, wrestling and Jiu Jitsu. On November 8, 2008, Stevenson earned his Brazilian Jiu-Jitsu black belt under Robert Drysdale. After his loss to Diego Sanchez, Stevenson got a call from Rashad Evans for an invite to check out his camp at Jackson's Submission Fighting. After being reluctant at first, he finally joined Greg Jackson's camp in April 2009.

Demian Maia Baptista (Portuguese pronunciation: [ˈdemiɐ̃ ˈmajɐ] born November 6, 1977) is a Brazilian mixed martial artist and Brazilian Jiu-Jitsu practitioner. He currently fights for the Ultimate Fighting Championship. Maia is currently ranked the #6 middleweight in the world by Sherdog and Yahoo! Sports., and the #8 middleweight fighter in the world by MMAWeekly.

Born in São Paulo, Brazil, Maia trained in Judo as a child. When he became a teenager, he also began studying Kung Fu and Karate. By age nineteen, Maia was introduced to Brazilian Jiu Jitsu by his cousin. After four years and seven months, Demian received his black belt under Fabio Gurgel. Demian Maia finished college and graduated with a degree in Journalism. He is currently a third degree black belt in Brazilian Jiu-Jitsu and has won several major tournaments under Team Brasa.

He won the 77–87 kg weight division at the 2007 ADCC Submission Wrestling World Championship, defeating Yushin Okami, Rafael Lovato, and Tarsis Humphres before armbarring Flavio Almeida in the finals. He also won the 2007 Super Challenge under 83 kg belt, defeating Vitelmo Kubis Bandeira by rear naked choke and Gustavo Machado by a judges decision before going on to defeat Fabio Negao by guillotine choke in the finals. On the heels of his ADCC championship in 2007, Maia released an instructional DVD series titled The Science of Jiu Jitsu I & II in collaboration with the World Martial Arts company.

Chael Patrick Sonnen (pronounced /ˈtʃeɪl ˈsʌnən/; born April 3, 1977) is an American mixed martial artist who competes as a middleweight in the Ultimate Fighting Championship. He was an NCAA Division I All-American wrestler at the University of Oregon, a silver medalist at the 2000 Greco-Roman World University Championships, as well as a two-time Dave Schultz Memorial International Greco-Roman winner.

As of October 2011^[update], Sonnen is ranked as the No. 2 middleweight in the world by Sherdog.

Sonnen was born Chael Patrick Sonnen on April 3, 1977 in West Linn, Oregon.

Sonnen started his MMA career at the age of 19 in 1997 by defeating Ben Hailey in Vancouver, Washington. His second fight was against future ICON Sport Middleweight Champion and Strikeforce Middleweight contender Jason "Mayhem" Miller. Sonnen went 6–0 in his first six fights, until his loss to Trevor Prangley, which he later avenged in 2006 at UFC Ultimate Fight Night 4. He also fought The Ultimate Fighter winner and former UFC Light Heavyweight Champion Forrest Griffin.