Video by Ryan Burton

LAS VEGAS - Antonio "Relentless" Orozco (26-0, 17 KOs) wasn't up to any tricks this April Fool's Day as he proudly pronounced his return to the ring with a dominating knockout over KeAndre "The Truth" Gibson (16-1-1, 7 KOs) in the fourth round of the main event live from The Cosmopolitan of Las Vegas and televised on ESPN Deportes and ESPN2.

Both fighters entered the ring undefeated, yet it was Orozco who walked away as the new WBC USNBC Super Lightweight Champion.

Celebrities in attendance at Orozco vs. Gibson included WBC World Champion Jorge "El Niño de Oro" Linares, former IBF Middleweight Champion Fernando Vargas and Golden Boy Promotions' fighters Mauricio "El Maestro" Herrera, Marcelino Lopez, Joseph "Diamante"; and Bernard Hopkins and Bernardo Osuna, who also served as ESPN's commentators for the evening's televised bouts.

In one of the most entertaining fights of the night, San Diego, CA's Mercito "No Mercy" Gesta (30-1-2, 16 KOs) and Gilberto "Flaco" Gonzalez (27-4, 22 KOs) of Mexico City went to war in a barn burner co-main event.

With non-stop action, Gonzalez used his impressive reach to knock Gesta down in the third round. However, for every hit taken, Gesta lived up to his nickname and showed 'No Mercy' bouncing back and putting his opponent up against the ropes in no time. Ultimately, the judges scored the fight with 99-91, 98-92, 96-93 all in favor of a unanimous decision for Mercito Gesta.

Participating in the swing bout televised on ESPN, the pride of Palmdale, CA Cesar Diaz (5-0, 4 KOs) went the distance for the first time in his career against seasoned fight veteran Felipe "Panterita" Rivas (17-19-4, 11 KOs) of Nogales, Mexico. At the end of the fight, the judges announced their scores of 60-54 awarding the unanimous decision victory to Cesar Diaz.