Former world champion Brandon Rios (34-3-1, 24 KOs) returned to the ring with a seventh round TKO of Mexico's Aaron Herrera (23-7-1, 14 KOs) in the main event of Premier Boxing Champions on FS1 and FOX Deportes Sunday night from The Pioneer Event Center in Lancaster, California.
A right hook to the body put Herrera on the mat. Herrera was unable to beat the count as the referee stopped the fight at 2:11 of the eighth round.
In the co-main event unbeaten Mario Barrios (19-0, 11 KOs) scored a knockout of Jose Luis Rodriguez (23-9-1, 13 KOs) with left hook to the body that ended in the seventh round.
Opening up the telecast, rising prospect Jose Miguel Borrego (12-0,11 KOs) remained unbeaten with a fourth-round stoppage of Kevin Watts (11-2, 4 KOs) in their super lightweight bout. Borrego sent Watts to the canvas with a left hand. Watts returned to his feet, Borrego quickly cornered him and delivered another flurry that forced referee Jack Reiss to halt the bout 2:42 into the round.