The HBO telecast kicks off live from the Cosmopolitan in Las Vegas, Nevada, pitting Mauricio Herrera against Jose Benavidez in a 12-round super lightweight showdown.
Second on the bill, two gritty middleweights square off for a vacant 160-pound title belt, as Matt Korobov meets Andy Lee in a 12-round contest.
The main event of the evening, a 12-round welterweight rumble, features Timothy Bradley Jr., against Diego Chaves.
Official Weights from Las Vegas:
Timothy Bradley Jr.: 145.8 lbs.
Diego Chaves: 146.5 lbs.
Matt Korobov: 159.4 lbs.
Andy Lee: 159.8 lbs.
Mauricio Herrera: 139.5 lbs.
Jose Benavidez: 138.5 lbs.