In the night's main event welterweight champion Dan Henderson knocked out Pride Middleweight Champion Wanderlei Silva to become the new middleweight champion. This victory by Henderson avenged an earlier loss to Silva after their first encounter in 2000 at Pride 12, with Silva winning that fight in a three-round unanimous decision.
A fight between Sergei Kharitonov and Gilbert Yvel was submitted for approval by the Nevada State Athletic Commission (NSAC). However, the fight did not take place after Yvel was denied a fighter's license by the NSAC based on a history of disqualification from multiple fights, most notably, his infamous attack on a referee. Kharitonov instead fought Mike Russow defeating him with an armbar.
A fight between Wes Sims and Kazuyuki Fujita was proposed but the NSAC turned it down due to competitive reasons—the fighters were at unequal experience/talent levels. After that a Wes Sims-Mark Hunt fight was turned down as well. The NSAC confirmed that Fujita would not be fighting anyone on the Pride 33 card as the deadline for receiving the medical records of fighters over the age of 35 (Fujita was 36) had passed (they must be submitted one week before the show so they can be properly reviewed and cleared).
Diaz defeated Gomi via a gogoplata submission at 1:46 in the second round. However, the result was later changed to No-Contest by the Nevada State Athletic Commission after Diaz tested positive for marijuana in a post-fight drug test.