Andre Berto back in action

Andre Berto returns to the ring for the first time since a tough loss to Jesus Soto Karass last year. Ronald Martinez/Golden Boy/Getty Images

After 14 months out of action because of a seriously injured right shoulder, former two-time welterweight titlist Andre Berto is ready to fight again.

On July 27, 2013, Berto tore a tendon in his shoulder during the second round of a fight with Jesus Soto Karass in San Antonio. Berto showed immense toughness by fighting with the injury into the 12th round, when he finally got knocked out in the all-action fight.

The loss was Berto’s third in four fights. Surgery and rehab followed. Surely some self-doubt did, also.

But Berto (28-3, 22 KOs), of Winter Haven, Florida, gets back in the ring against Philadelphia’s Steve Upsher Chambers (24-3-1, 6 KOs) for a scheduled 10-round fight at a maximum weight of 149 pounds on Saturday night (Showtime, 9:30 ET/PT) in the opening bout of a tripleheader from U.S. Bank Arena in Cincinnati.

Former three-division titlist Adrien Broner headlines the card in his hometown in a junior welterweight bout against Emanuel Taylor with junior welterweight slugger Lucas Matthysse facing Roberto Ortiz in the co-feature.

Berto finishes training camp with Virgil Hunter in Oakland, California, on Monday and heads to Cincinnati on Tuesday.

"The shoulder is feeling good and we've had a tremendous camp,” Berto said. “I was able to get out here really early for this fight and train with all the great champions in our gym. I'm just excited to get back under the lights and perform on Sept. 6," Berto said.

Berto trained alongside fighters such as Andre Ward, Abner Mares, Alfredo Angulo and Amir Khan.

Besides the three fights on Showtime, preliminary fights from the card will air on Showtime Extreme (7 ET/PT).

The two scheduled 10-round fights set to air on Showtime Extreme are:

• Junior welterweight Michael Perez (20-1-2, 10 KOs) of Newark, New Jersey, against South Carolina's Jared Robinson (15-1, 7 KOs).

• Three-time U.S. Olympian Rau'shee Warren (11-0, 3 KOs), who will be fighting in his hometown for the first time as a professional, taking on Jose Luis Araiza (34-8-1, 25 KOs) of Mexico in a bantamweight match.

In untelevised bouts, two of Warren’s 2012 U.S. Olympic teammates will fight: Cleveland middleweight Terrell Gausha (11-0, 6 KOs) and New York lightweight Jamel Herring (8-0, 5 KOs), who are both in scheduled eight-round bouts.