Quinton Ramone "Rampage" Jackson (born June 20, 1978) is an American mixed martial artist, actor and former professional wrestler, who most recently fought in the Bellator MMA and won the Bellator MMA: Season Ten Light Heavyweight Tournament. He is a former UFC Light Heavyweight Champion and unified the Pride Middleweight Championship belt. Due to his eccentric personality and aggressive fighting style, Jackson became a star in Japan during his tenure with Pride FC and following his move to the UFC, he helped pioneer MMA's growth into a worldwide sport.

Description above from the Wikipedia article Quinton Jackson, licensed under CC-BY-SA, full list of contributors on Wikipedia.