By Matt Lieberman: Jermell Charlo is in negotiations for a unification fight against IBF/WBA 154-pound champion Jeison Rosario for September. ESPN is reporting the news on WBC junior middleweight champ Charlo (33-1, 17 KOs) and Rosario (20-1-1, 14 KOs) in talks that are “moving well.” The IBF has already accepted the Rosario-Charlo unification fight, which […]