Written by Tom Sullivan & Bear Aderhold and Adam Rifkin, “Knucklehead” follows the on-the-road adventures of a trio of misfits – a naïve giant and church orphan-turned-amateur fighter Walter Krunk (BIG SHOW); former mixed martial arts champion-turned-manager Eddie Sullivan (MARK FEUERSTEIN); and church aide-turned-chaperone, Mary O’Connor (MELORA HARDIN) &ndash fighting their way across the south to the annual Pro-Am mixed martial arts tournament in New Orleans.