Hoping for Guerrero, Mares bouts in June

Golden Boy Promotions already has the vacant featherweight title bout between Gary Russell Jr. and Vasyl Lomachenko penciled in for a June 21 Showtime card at StubHub Center in Carson, Calif., but it is also planning to add two more of its high-profile fighters to the show.

Golden Boy chief executive Richard Schaefer told ESPN.com that besides Russell-Lomachenko, which the company won the right to promote in a purse bid, he is also hoping to add bouts involving welterweight Robert Guerrero and featherweight Abner Mares to make it a tripleheader.

Golden Boy and Guerrero, who has not fought since a one-sided decision loss to Floyd Mayweather in a May 2013 welterweight title fight, have been at odds. Guerrero has been trying to break his contract with the company, but his recent signing with adviser Al Haymon probably will alleviate that issue. Schaefer said he hopes Guerrero and the company can work things out and that he will fight on the show.

Mares lost his featherweight belt by first-round knockout in a big upset to Jhonny Gonzalez in August and was supposed to meet him in a February rematch, but it was scrapped after Mares suffered a rib injury in training and not rescheduled.

They might fight again later in the year, but Mares will instead fight before that happens. June 21 could be the date, Schaefer said. Mares manager Frank Espinoza told ESPN.com that he hoped to work out a deal for Mares to fight on that card.