Jason L. Lambert (born September 23, 1977) is an American mixed martial artist from Victorville, California, who fought in the light heavyweight division for the Ultimate Fighting Championship prior to being released from the company. He fights out of North County Fight Club and is represented by NCFC Fight Management.

Lambert made his debut in the UFC at UFC 58: USA vs. Canada as a late replacement for The Ultimate Fighter 2 cast member Seth Petruzelli, who suffered a concussion while training and had to withdraw from the bout. Lambert's debut was successful, submitting his opponent, Rob MacDonald, early in the first round.

Lambert fought again at UFC 59, defeating Terry Martin by technical knockout at 2:37 of round two. This was a preliminary fight that did not air on the pay-per-view broadcast. His next fight, against Branden Lee Hinkle at Ultimate Fight Night 5, marked Lambert's third consecutive UFC victory. Despite this initial win streak, he was not seen on a live UFC pay-per-view broadcast until UFC 63, where he lost to Rashad Evans by knockout in the second round. At UFC 68, Lambert defeated veteran and former title challenger Renato "Babalu" Sobral in a stunning upset by second-round knockout.

Matthew Peter Horwich (born October 2, 1978) is an American mixed martial artist. Previously fighting for the Portland Wolfpack of the International Fight League where he held the middleweight championship in 2007, BAMMA and in the UFC, he holds notable wins over past and present UFC fighters Jake Rosholt, Thales Leites, Jason Lambert, Benji Radach, Mike Pyle, Jason MacDonald and Krzysztof Soszynski.

Growing up, Matt Horwich had little interest in school due to low opinions of his teachers. Unmotivated, lost and without a concrete path to embark on, he began to experiment with drugs and alcohol. Things were not looking bright as his poor choices continued to lead him in the wrong direction. He then garnered interest for Brazilian Jiu-Jitsu (BJJ) at the age of seventeen and saved up enough money to learn from none other than Royce Gracie himself. After that, he reluctantly made an unwise decision and was placed in jail for ten days with the possession of drugs. He served his time and chose to relocate to Seattle, Washington with the intention of starting a band. While there, he performed odd jobs and lived in squats as he crossed-paths between becoming either a musician or martial artist. He then eventually experienced a religious conversion as a self-described "spiritual" Christian and rededicated himself to a successful, focused career in martial arts.

Abe Jacobs (born 1938) is a retired New Zealand professional wrestler. He was one of the first men to follow fellow New Zealander Pat O'Connor to the United States where, like O'Connor, Jacobs became a major star in the National Wrestling Alliance during the "Golden Age of Wrestling". One of the most recognisable "babyfaces" during this period, he was billed as the "Jewish Heavyweight Champion" and wrestled in a number of high-profile matches with many stars of the era including numerous bouts against NWA World Heavyweight Champions Lou Thesz, Gene Kiniski, Buddy Rogers, Dick Hutton and Pat O'Connor. His bout against O'Connor in 1961, which aired on Capitol Wrestling’s weekly television show, was the first time two New Zealanders wrestled for a championship title on foreign soil.

Jacobs was also an established journeyman wrestler, touring Europe and Japan on several occasions, travelling around the world 4 times and wrestling over 8,000 matches in his 30-year career. Although never reaching the heights of O'Connor as a singles wrestler, he was very successful as a "tag team specialist" winning the NWA Florida-version of the NWA World Tag Team Championship with Don Curtis, the NWA Los Angeles International Television Tag Team Championship with Haystacks Calhoun, and the NWA Western States Tag Team Championship with Pez Whatley. Other partners included George Becker, Antonino Rocca, Sailor Art Thomas, Klondike Bill, Man Mountain Mike and "Coloured Heavyweight Champion" Luther Lindsay.

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.