Top Boxer Yuriorkis Gamboa is back at PSI training for an upcoming fight June 8 against Darley Perez in Montreal. Gamboa is 22-0 with 16 KO's. He is a former unified featherweight titleholder and current intermim junior lightweight titleholder. He will move up another weight class to lightweight, to face Perez who is 28-0 with 19 KO's.. The fight will be the HBO-televised co-feature to the Chad Dawson-Adonis Stevenson light heavyweight championship main event.