David Benavidez became the first boxer to win championships at 168, 175 and 200 pounds, pounding his former sparring partner Gilberto “Zurdo” Ramirez, knocking him out at 2:59 of the sixth round to win the WBA and WBO cruiserweight titles on Saturday night. Benavidez not only remained undefeated, but showed why he was a -600 favorite in twice sending Ramirez to the canvass. In the co-main event, WBA super middleweight championship fight, Jaime Munguía upset title holder Armando Reséndiz by winning a resounding unanimous decision.