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UFC 48: Payback
Preliminary card
- Welterweight bout:
Georges St-Pierre vs. 
Jay Hieron
- St-Pierre wins by technical knockout (punches) at 1:42 of round one. Hieron was a late replacement for Jason “Mayhem” Miller, who had withdrawn from the card due to ongoing legal problems. [3]
- Middleweight bout:
Trevor Prangley vs. Curtis Stout
- Prangley wins by submission (neck crank) at 1:05 of round two.
- Lightweight bout: Matt Serra vs.
Ivan Menjivar
- Serra defeated Menjivar via unanimous decision (30-27, 30-27, 30-27).
Main card
- Middleweight bout: Evan Tanner vs. Phil Baroni
- Tanner defeated Baroni via unanimous decision (30-27, 30-27, 29-28).
- Welterweight bout: Matt Hughes vs.
Renato Verissimo
- Hughes defeated Verissimo via unanimous decision (30-27, 30-27, 30-27).
- Heavyweight Championship bout: Frank Mir vs. Tim Sylvia
- Mir wins by Technical Submission (armbar) at 0:50 of round one.[4] Referee Herb Dean called a stop to the bout when he noticed a break in Sylvia’s arm which appeared to Sylvia and the audience as an early stoppage; it was later revealed that Sylvia had indeed suffered multiple fractures to his right forearm. [5] Mir claims the vacant UFC Heavyweight Championship.
- Welterweight bout: Frank Trigg vs. Dennis Hallman
- Trigg wins by TKO (punches) at 4:13 of round one.
- Heavyweight bout: Ken Shamrock vs. Kimo Leopoldo
- Shamrock wins by TKO (knee strike) at 1:23 of round one.