UFC 73: Stacked
- Lightweight bout: Mark Bocek vs. Frankie Edgar
- Edgar defeated Bocek via TKO (strikes) at 4:55 of round 1.
- Welterweight bout: Chris Lytle vs. Jason Gilliam
- Lytle defeated Gilliam via submission (inverted triangle choke) at 2:15 of round 2.
- Lightweight bout: Diego Saraiva vs. Jorge Gurgel
- Gurgel defeated Saraiva via unanimous decision (30-27, 30-27, 30-27).
- Light Heavyweight bout: Mike Nickels vs. Stephan Bonnar
- Bonnar defeated Nickels via submission (rear naked choke) at 2:14 of round 1.
- Heavyweight bout: Antônio Rodrigo Nogueira vs. Heath Herring
- Nogueira defeated Herring via unanimous decision (29–28, 29-28, 29-28).
- Lightweight Championship bout: Sean Sherk (c) vs. Hermes Franca
- Sherk defeated Franca via unanimous decision (50–45, 50–45, 49–46). The California State Athletic Commission later announced that both fighters tested positive for performance enhancing drugs. Sherk was eventually stripped of the title.
- Light Heavyweight bout: Tito Ortiz vs. Rashad Evans
- Evans and Ortiz fought to a unanimous draw (28-28, 28-28, 28-28). Ortiz was deducted one point in the second round for repeatedly grabbing the fence.
- Middleweight Championship bout: Anderson Silva (c) vs. Nathan Marquardt
- Silva defeated Marquardt via TKO (punches) at 4:50 of round 1.
- Lightweight bout: Kenny Florian vs. Alvin Robinson
- Florian defeated Robinson via TKO (strikes) at 4:30 of round 1. This fight was delayed until after the main event due to time constraints.