Warrior (2011)

The youngest son of an alcoholic former boxer returns home, where he's trained by his father for competition in a mixed martial arts tournament - a path that puts the fighter on a collision course with his estranged, older brother. U.S. Marine Tommy Riordan visiting his father, Paddy Conlon, a recovering alcoholic who has become a born-again Christian. Tommy enters a gym and beats a professional fighter named Pete Grimes unconscious. He learns about a winner-takes-all MMA tournament called Sparta and asks his father to train him. Meanwhile, Tommy's older brother Brendan, a high school physics teacher, seeks the training of an old friend and begins competing in smaller venue fights. Brendan and Tommy both enter the Sparta tournament, but their bitter relationship threatens their chances of winning. As the tournament unfolds, Tommy's military desertion is revealed, causing the military police to want to take him into custody. Despite their differences, Brendan and Tommy make it to the final fight where Brendan forces Tommy to tap out with a rear naked choke. The brothers reconcile and leave the ring together.