Among Dead Men (2008)

Bobby Delgado, undefeated MMA World Champion is incarcerated for eight years after accidentally killing his opponent. During this period of purgatory, Bobby experiences a paranormal 'life changing' event that will dictate his future path to redemption. Infuriated by the financial loss and the death of his master fighter, Jarvis Sweet swears vengeance on Delgado and finds himself a new hitter in the form of Wade Bull, a vicious ex underworld enforcer with killing skills few men can match.