IBF Featherweight Champion Juan Manuel Marquez annexes the WBA version held by Derrick Gainer in one of the worst fights to ever take place. Fighting on the undercard of a bout featuring pound-for-pound claimant Floyd Mayweather Jr., Marquez and Gainer play an extended game of chicken, seldom throwing a punch, until a clash of heads produces a cut on the WBA Champion that affords him a way out of the fight. Having pushed the minimal action, Marquez is awarded a unanimous technical decision.

Juan Manuel Marquez vs. Derrick Gainer

IBF Super Featherweight Champion Diego Corrales shares a billing with WBC Champion Floyd Mayweather Jr. in order to build interest in a fight between them. Mayweather wins a landslide decision against Gregorio Vargas while Corrales defends his title against Roy Jones protege Derrick Gainer on the undercard. The bout is even until Corrales puts Gainer down twice in the third round. Though Gainer beats the count both times, Referee Jay Nady doesn't like what he sees and controversially stops the fight.

The Battle For The Championships: Diego Corrales vs. Derrick Gainer

Gainer attempted 3 times to make weight in the official weigh-in. He weighed at 58.7 kgs. (129.4 lbs) on the first attempt and 57.7 (127.2 lbs) on the second attempt. Fortunately, Gainer was able to make weight at 57.0 (125.7 lbs) at his third attempt, 2 hours after the first try. Chris John weighed at 57.1 kg. (126 lbs.) at the first attempt. - John down in round one
- The first mandatory title fight for Chris John.

Juan Manuel Marquez vs. Derrick Gainer

The Battle For The Championships: Diego Corrales vs. Derrick Gainer

Chris John vs Derrick Gainer

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