Among Dead Men (2008)

Life on the wild side sometimes has its own way in regulating or instigating consciousness awakening on its most devoted disciple. Bobby Delgado, undefeated MMA World Champion (of an elusive and clandestine underworld tournament of Mixed Martial Arts) 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.