Luis Ramos Jr. lost the first bout of his pro career when he could not come out for the sixth round of his Fox Sports Net-televised fight against Ricardo Williams Jr. on Saturday due to severe cuts over both eyes.

Williams (21-3, 11 knockouts), a 31-year-old southpaw from Cincinnati, Ohio, earned a controversial technical stoppage in the main event at the Business Expo Center in Anaheim, Calif., because only one of the deep jagged cuts above Ramos’ eyes were ruled to be the result of an accidental headbutt.

Ramos (23-1, 10 KOs) was ahead on two of the official scorecards after five rounds of even exchanges thanks to a technical knockdown he scored early in the second round. Ramos, a 24-year-old southpaw from Santa Ana, Calif., clipped Williams with a left that knocked the 2000 Olympic silver medalist back on his heels and into a corner where he needed to hold onto the ropes to keep from hitting the canvas.

The knockdown spurred Ramos to take the fight to Williams, who timed the aggressive younger fighter with flush straight lefts in rounds three, four and five. However, Ramos continued to charge forward, landing one-two combinations and body shots.

Williams’ forehead accidentally clashed into Ramos’ left eye socket midway through the fifth round, producing a huge bleeding gash over the eye along with swelling. Ramos opted to continue fighting and charged into Williams with both hands blazing. Williams returned fire and at some point before the end of the round, Ramos suffered another bad cut — this time above his right eye.

It was not clear if the second cut was the result of a clash of heads or a clean punch (although the deepness and severity of the gash suggests that it probably came from a headbutt). Ramos was deemed unfit to continue, ending the bout. Ramos’ corner thought both cuts were produced by accidental head clashes, which if ruled so, would have sent the bout to the scorecards. Had that happened, Ramos would have won a technical split decision. However, referee Raul Caiz Jr. did not make that ruling, infuriating Ramos’ trainer, Hector Lopez, and perhpas setting up a protest to the California State Athletic Commission.

Both Ramos and Williams were gracious after the fight and both said they were willing to fight again. Ramos, however, will need to stay out of the ring for a few months while his cuts heal.

In the co-featured bout of the live Fox Sports Net/Fox Deportes broadcast junior middleweight prospect Jermall Charlo extended his unbeatn record to 10-0 (6) with a technical stoppage of tough-but-limited Edgar Perez after four rounds. Perez, a 33-year-old Chicago resident from Puerto Rico, was kept on his stool by his traininer after he suffered cuts and brusiing around both eyes.

Charlo, the 22-year-old Houston native and twin brother of undefeated prospect Jermell Charlo, controlled the bout with hard and accurate jabs and right hands, as well as sporadic lateral movement, body work and fast combinations when in close.

Two 2012 U.S. Olympians were also featured on the broadcast. Three-time Olympian Rau’Shee Warren, a 25-year-old bantamweight southpaw from Cincinnati, won his second pro bout with a unanimous four-round decision over game and awkward David Reyes (2-3-1), of Montebello, Calif. Warren (2-0) won the competitive fight by scores of 40-36 (twice) and 39-37.

Jamel Herring, the 27-year-old lightweight reprentative on the 2012 U.S. squad, won his pro debut with one-sided unanimous four-round decision over outclassed Jose Valderrama (3-3, 2 KOs), of Manati, Puerto Rico. The former marine from Coram, N.Y. won by three scores of 40-36. 

Adrien Broner, THE RING’s No. 1-rated lightweight and WBC beltholder, was in attendance. The undefeated two-division titleholder was there to support his fellow Cincinnati natives and boxing role models, Williams and Warren, as well as Herring, who is also trained by Mike Stafford.