John Gotti III will try to stay perfect as a pro fighter when he returns to the cage next month. Gotti III (3-0), grandson of the infamous mob boss of the same name, is set to take on DeVon Mosley (3-2) in a welterweight bout at CES MMA 56, the promotion today announced. CES MMA 56 takes place May 31 at Connecticut Convention Center in Hartford, Conn. It streams on UFC Fight Pass