UFC 83: Serra vs St-Pierre 2
- Welterweight bout: Jonathan Goulet vs. Kuniyoshi Hironaka
- Goulet defeated Hironaka via TKO (punches) at 2:07 of round 2. This bout aired last on the PPV broadcast following the Serra vs. St-Pierre fight.
- Heavyweight bout: Cain Velasquez vs. Brad Morris
- Velasquez defeated Morris via TKO (punches) at 2:10 of round 1.
- Lightweight bout: Sam Stout vs. Rich Clementi
- Clementi defeated Stout via split decision (29–27, 28-29, 29–28.
- Middleweight bout: Jason MacDonald vs. Joe Doerksen
- MacDonald defeated Doerkson via TKO (elbows) at 0:56 of round 2.
- Middleweight bout: Demian Maia vs. Ed Herman
- Maia defeated Herman via submission (triangle choke) at 2:27 of round 2.
- Middleweight bout: Jason Day vs. Alan Belcher
- Day defeated Belcher via TKO (punches) at 3:58 of round 1.
- Lightweight bout: Mark Bocek vs. Mac Danzig
- Danzig defeated Bocek via submission (rear naked choke) at 3:48 of round 3.
- Middleweight bout: Kalib Starnes vs. Nate Quarry
- Quarry defeated Starnes via unanimous decision (30–26, 30–27, 30–24). The third score marks the second-widest point margin in a three-round fight in UFC history, with the record belonging to a bout between Forrest Petz andSammy Morgan, which was scored 30–23 Petz by one judge.
- Middleweight bout: Michael Bisping vs. Charles McCarthy
- Bisping defeated McCarthy via TKO (arm injury) at 5:00 of round 1.
- Middleweight bout: Rich Franklin vs. Travis Lutter
- Franklin defeated Lutter via TKO (punches) at 3:01 of round 2.
- UFC Welterweight Championship unification bout: Matt Serra (c) vs. Georges St-Pierre (ic)
- St-Pierre defeated Serra via TKO (knees) at 4:45 of round 2. to become the undisputed UFC Welterweight Champion.