Ryan Roach’s Fighter Locker has signed 2016 Olympic silver medalist Yuberjen Martinez to an exclusive managerial contract. The 29-year-old Colombian light flyweight has a 7-0 (2 KOs) record in the World Series of Boxing.  “After having a beautiful amateur career,” Martinez announced, “we have decided to go pro and signed a managerial contract with Fighter Locker. I still plan […]