Early career Tanner, with a wrestling background, began fighting in 1997 when he was convinced by friends to enter a local MMA tournament hosted by the now defunct Unified Shoot Wrestling Federation. He won the tournament by defeating three fighters in one night, including future UFC heavyweight contender
Paul Buentello. After his initial success, Tanner taught himself submission and
grappling techniques using instructional videos created by the famous
Gracie family. He continued to fight in local shows and tournaments in Texas and Iowa before traveling to Japan to compete in the Pancrase organization. He won five fights overseas and competed in the USWF once more before being asked to join the UFC. Tanner made his UFC debut in 1999 at
UFC 18, submitting fellow Amarillo native Darrell Gholar by
rear naked choke in the first round. His next UFC fight was at
UFC 19 against Valerie Ignatov, who was known for leg submissions. Because of this, Tanner decided to fight barefoot for the first time in his career. Tanner fought once more in Pancrase and defended his title two more times in the USWF before deciding to take the first of multiple breaks from fighting in his career. He returned in July 2000 and remained undefeated in the USWF, successfully defending his heavyweight belt with wins against Raoul Romero and Vinny Nixon. His next appearance was at
UFC 29, where he defeated
Lance Gibson by
TKO.
A new outlook on fighting With three victories in the UFC, Tanner received a title shot against
UFC light heavyweight champion Tito Ortiz at
UFC 30. He was knocked unconscious 32 seconds into the first round by a high level slam by Ortiz. Tanner was invited to compete in the −88 kg division at the 2001
ADCC Submission Wrestling World Championship April 11–13, 2001 at the Abu Dhabi Combat Club in
Abu Dhabi, United Arab Emirates. He was defeated by
Sanae Kikuta on points (6–0) in the first round. Tanner began training with
Oregon-based
Team Quest. He returned to the Octagon at
UFC 34, defeating
Homer Moore in the second round with an
armbar. At
UFC 36, he defeated
Elvis Sinosic by TKO (cut). At
UFC 38, he won a unanimous decision over
Chris Haseman in an undercard bout. At
UFC 42, he lost to Rich Franklin by
TKO (strikes) in the first round. After his defeat by Franklin, Tanner moved to the middleweight division, where he would be more physically imposing than many of the opponents.
Baroni I and II Tanner faced
Phil Baroni in consecutive fights at
UFC 45 and
UFC 48. In the early minutes of their fight at UFC 45, Baroni was in control, but Tanner took Baroni to the ground and landed a series of unanswered punches and elbows. After a brief verbal exchange between Baroni and referee Larry Landless, the fight was stopped and Tanner was awarded the victory. Immediately after the fight, Baroni contended that he did not submit and in the confusion struck Landless twice in the face. Baroni maintained that it was a verbal miscommunication and he never asked for the fight to be stopped. To quell the controversy, the UFC agreed to give Baroni a rematch at
UFC 48, which Tanner won.
Road to the UFC Middleweight title Tanner defeated
Robbie Lawler at
UFC 50 in October 2004, submitting Lawler with a
triangle choke. Afterward, Tanner began training on his own. He fought for the vacant UFC middleweight championship against
David Terrell at
UFC 51 in February 2005. He defeated Terrell to become the first UFC middleweight champion since
Murilo Bustamante held the title before leaving for
PRIDE Fighting Championships in 2002. Tanner fought Franklin again at
UFC 53 in June 2005. Franklin won when the fight was stopped by the ringside doctor due to multiple cuts and swelling on Tanner's face. With the win, Franklin was named as a coach for
The Ultimate Fighter 2 reality television show, along with then
UFC Welterweight champion
Matt Hughes. While Franklin and Hughes did not fight at the conclusion of the show, Hughes said he would have challenged Tanner for the UFC middleweight title if Tanner had been a coach on the show. After losing the title, Tanner began training with
American Top Team, but lost his next fight to
David Loiseau at
Ultimate Fight Night 2 in October 2005. Tanner was ahead on points until the fight was stopped in the second round due to a cut received from a Loiseau elbow. Shortly after this fight, Tanner appeared as himself on an episode of
Beyond the Glory on
FOX Sports that chronicled the history of the
UFC. He also became a member of the
Chute Boxe team. Tanner returned to the UFC in April 2006 at
UFC 59, defeating
Justin Levens in what was Tanner's last victory in MMA. Levens was a late replacement for
Jeremy Horn, who was forced to withdraw after a training injury.
2006–08 On December 29, 2006, Tanner unveiled plans to set up a mixed martial arts training camp at his house in
Gresham, Oregon for disadvantaged athletes and young men at risk. In February 2007, he announced that 12 athletes would reside in the house from six different weight classes. In a March 2007 interview with MMA Weekly, Tanner was asked about the possibility of fighting again, but said he wanted to focus on developing his foundation. He said he would be training year-round with the athletes he was coaching and that it might only be a matter of time before he returned. UFC president
Dana White was interviewed by
CBS Sportsline one week later and said Tanner would be welcomed back whenever he was ready. On May 11, 2007, further foundation development was put on hold by Tanner, citing his own training and a bad experience with the first fighter that was invited to the house. Tanner announced through his official website that he would return to active competition and attempt to regain the UFC middleweight title. Speculation arose that Tanner would return to the UFC in December 2007 at
UFC 79 against
Dean Lister. Tanner dismissed the report as he was battling an alcohol addiction. He left Chute Boxe and began training at Hard Knocks Kickboxing in Las Vegas. On November 8, 2007, Tanner announced the signing of a four-fight deal with the UFC. He chose to accept no corporate sponsorships and instead started "Team Tanner," an exclusive fan club for his upcoming fights. In what would be his final fight, Tanner lost to
Kendall Grove in a split decision at
The Ultimate Fighter 7 Finale on June 21, 2008, the fifth loss in his last ten fights. In a post-match interview, he said he felt "flat" throughout the fight and that he had begun wondering if his two years of serious
alcohol abuse had damaged his body past the point of which he could compete at the level he once had. == Death ==