30–27). A month after UFC 52, St-Pierre decided to participate in the biggest grappling tournament in the world in the under 77 kg division. In his first fight participation in the ADCC Submission Wrestling World Championship he faced Otto Olson (Trials champion and ADCC 2003 silver medalist beating names like Daniel Moraes, in the Trials final and in the first fight of the ADCC tournament, Fernando Augusto and Cris Brown). St-Pierre won on points showing superiority in Wrestling. In his second fight, St-Pierre faced Leonardo Silva Dos Santos: bronze (2000) and silver (2001) medalist of the World IBJJF Jiu-Jitsu Championship and was defeated in a flying armbar at 50 seconds into the fight. St-Pierre was then matched up against top contender Frank Trigg at UFC 54. St-Pierre controlled the fight and eventually sneaked in a rear-naked choke with less than a minute remaining in the first round. He then faced future lightweight champion Sean Sherk at UFC 56. Midway through the second round, St-Pierre became the second fighter to defeat Sherk and the first to finish him. During the post-fight interview, he famously went down on his knees with an impassioned plea to UFC management to give him another title shot. At UFC 58, St-Pierre defeated former UFC welterweight champion B.J. Penn to become the No. 1 contender for the UFC welterweight title. St-Pierre won the match by split decision and was set for a rematch against then-champion Matt Hughes at UFC 63. St-Pierre was forced to withdraw from the match, however, due to a groin injury and was replaced by the man he defeated in March, B.J. Penn. The UFC announced afterward that St-Pierre would have the opportunity to fight for the title when his condition was fully healed. St-Pierre was seen as a trainer on The Ultimate Fighter 4: The Comeback on Spike TV, which featured fighters who were previously seen in UFC events including Matt Serra, Shonie Carter, Pete Sell, Patrick Côté, and Travis Lutter. St-Pierre was seen vocally supporting fellow Canadian and training partner Patrick Côté during the season's airing. Winning and losing the Welterweight Championship At UFC 63, St-Pierre made an appearance to support fellow Canadian David "The Crow" Loiseau. At that time he was seen pushing Loiseau to "fight his fight" against Mike Swick. At the same event, after Matt Hughes had defeated B.J. Penn, St-Pierre stepped into the cage to hype up his