Junior middleweight titlist Jermell Charlo is scheduled to defend his belt for the third time June 9 at Staples Center in Los Angeles in the Showtime co-feature of the Leo Santa Cruz-Abner Mares II card. While Charlo doesn't have an opponent signed yet, a source with knowledge of the plans told ESPN on Friday that Charlo (30-0, 15 KOs), 27, of Houston, likely will face former titlist Austin Trout (31-4, 17 KOs), 32, of Las Cruces, New Mexico. Trout, a southpaw, ended a two-fight losing skid in February with an eight-round decision over Juan De Angel. The those losses were both in junior middleweight world title fights, a 10th-round stoppage Jarrett Hurd in October and a competitive decision loss to Jermall Charlo, Jermell’s twin brother, in 2016.