LOS ANGELES  – Unified world cruiserweight champion Gilberto “Zurdo” Ramirez (48-1, 30 KOs) has confirmed the first All-Mexican showdown in the cruiserweight division against undefeated, two-division world champion David “The Mexican Monster” Benavidez (31-0, 25 KOs) on Cinco de Mayo weekend, Saturday night, May 2, in Las Vegas, Nevada.