David Benavidez defeated Gilberto “Zurdo” Ramirez by sixth-round KO to win the WBA and WBO cruiserweight titles on Saturday night at T-Mobile Arena in Las Vegas.

Benavidez (32-0, 26 KOs) became a three-division champion and the first fighter to win world titles at super middleweight, light heavyweight and cruiserweight. This was Benavidez’s first fight in the 200-pound division. He entered the fight following a dominant seventh-round TKO of Anthony Yarde in November.

Ramirez (48-2, 30 KOs) was making the first defense of his unified championship. After going 5-1 at light heavyweight — with all five wins by stoppage — Ramirez had gone the distance in each of his four cruiserweight bouts before losing to Benavidez.

In the co-main event, Jaime Munguia (46-2, 35 KOs) dominated Jose Armando Resendiz (16-3, 11 KOs) to win the WBA super middleweight title by unanimous decision with scorecards of 117-111, 119-109 and 120-108.

Andreas Hale was in Las Vegas with full coverage, including undercard results and round-by-round analysis.