By Miguel Maravilla at ringside

Heavyweight Andy Ruiz Jr. (32-1, 21 KOs) of Imperial Valley, California stopped Germany-based Russian Alexander Dimitrenko (41-5, 26 KOs) in five rounds in his PBC debut in the co-feature bout on Saturday night at the Dignity Health Sports Park (formerly the StubHub Center) in Carson, California.

Dimitrenko popped the jab early in the opening round as the shorter man Ruiz stalked going to the body and finished the round strong. Attacking the body in round two, Ruiz stayed on top of Dimitrenko. Continuing to stalk in the third, Ruiz landed a chopping right, shortly after a short right hand found its mark as Dimitrenko was momentarily staggered. Staying busy in the fourth Ruiz kept backing Dimitrenko, who continued to just work off the jab. A chopping right hand in the fifth followed by a straight right got Dimitrenko’s attention as Ruiz kept up the pressure. After the bell, Dimitrenko went to the corner and could not continue. Referee Ray Corona waved it at the end of the fifth.

Hard-hitting Mexican veteran Alfredo “El Perro” Angulo (25-7, 21 KOs) knocked out Evert Bravo (24-10-1, 18 KOs) of Columbia in round two. El Perro was aggressive from the start attacking Bravo knocking him down in the second round with a barrage of punches. The referee reached a ten count at 1:23 of the second.

2016 U.S. Olympian lightweight Karlos Balderas (8-0, 7 KOs) of Santa Maria, California scored a fourth round knockout over Pedro Vicente (6-3, 2 KOs). Balderas scored knockdowns in the second and third rounds. Balderas was too much for Vicente and referee Ray Corona upon request of the corner stopped the fight at 1:07 of the fourth.

Lightweight prospect Rolando Romero (9-0, 8 KOs) of Las Vegas knocked out Andres Figueroa (9-4, 5 KOs) of Coloumbia in four rounds. A huge left hook knocked Figueroa out cold as the referee immediately waved it at 1:27 of the fourth.

Fontana, California’s lightweight Raymond Murattala (7-0, 5 KOs) broke down Jose Cen Torres (13-12, 1 KO). Muratalla boxed patiently from the start and went downstairs to the body in round three sending Torres to the canvas three times as referee Ray Corona 2:58.

Super bantamweight Shane Mondragon (2-0, 2 KO’s) of Colorado stopped Hugo Rodriguez (0-4) of Mexico in the third. The young prospect Mondragon was busy attacking and backing Rodriguez. The referee had seen enough as he stepped in at 1:55 to stop the fight.

Lightweight Nelson Hampton (5-2, 4 KOs) of Texas won a hard fought unanimous decision over Naseem Asad (0-5) of Cincinnati. Hampton stalked the elusive southpaw throughout the fight, shooting the right backing the slippery Asad. Continuing to stay busy, Hampton was productive as Asad gave him all he can handle and even backing him in the fourth and final round in going the distance four rounds. All three judges scored the fight 40-36.

In the opening bout from the Dignity Health Sports Park in Carson, California, super featherweights Ricky Lopez (20-4-1, 6 KOs) of Colorado and Joe Perez (14-3-2, 10 KOs) fought to a ten round draw. It was a back and forth battle as Lopez and Perez brought the best out in each other. Late in the fight, Perez suffered a cut on top of his head in the eighth round. With Lopez and Perez finishing strong it was up to the judges. Scores for the fight were 97-93 Perez, 97-93 for Lopez, and 95-95.