Lucas Matthysse planning comeback at 147 pounds

Hard-punching Lucas Matthysse is preparing for a comeback -- in a new weight class -- that will likely take place May 7 on the Canelo Alvarez-Amir Khan undercard. Emily Harney/Hoganphotos/Golden Boy

Lucas Matthysse, one of boxing's most exciting fighters, is back in training and preparing for a comeback that will take place in a new weight class and probably on one of the biggest stages in boxing.

Matthysse, the huge puncher from Argentina, is leaving behind the junior welterweight division and headed to the talent-rich welterweight division for a return that likely will take place in the co-feature of the fight between middleweight champion Canelo Alvarez and Amir Khan on May 7 (HBO PPV). The site of the fight is not 100 percent decided but will probably take place at the new T-Mobile Arena in Las Vegas.

Matthysse (37-4, 34 KOs), 33, does not have an opponent yet for his return but Golden Boy Promotions vice president Eric Gomez told ESPN.com that he is working on a fight against a quality contender.

"Lucas started training on Jan. 1. He's coming back at 147 [pounds]. He's motivated and hungry after his loss. It made him hungrier," Gomez said.

After Matthysse outpointed former junior welterweight titlist Ruslan Provodnikov last April in a sensational slugfest that was a top fight of the year contender, he challenged Viktor Postol for a vacant world title and got knocked out in the 10th round of an upset loss.

Gomez said it's time for Matthysse to move up in weight.

"He has been at 140 for his entire career [which began in 2004] and even fought at that weight as an amateur," Gomez said. "I think for him to go to 147 will make him better. He won't have to struggle to come down in weight."

Should Matthysse be successful in his welterweight debut, Gomez said there are good fights out there for him. He said one potential match could be for a world title against Sadam Ali, should Ali defeat Jessie Vargas on March 5 for a vacant belt.

"Matthysse has always been a guy who would fight anybody," Gomez said. "He could fight Sadam Ali if he beats Vargas, any of the top guys. Maybe Tim Bradley, maybe a rematch with Provodnikov. Maybe Manny Pacquiao would be interested in fighting him. That would be a great fight."