Eddie Alvarez (born January 11, 1984) is an American professional mixed martial artist and bare-knuckle boxer who most recently competed in the Welterweight division of BKFC. He also formerly competed in the UFC and Bellator MMA, and also One FC winning world titles in each of the first two: the UFC Lightweight Championship once and the Bellator Lightweight World Championship twice. Alvarez was the first Lightweight champion in Bellator MMA. He has also competed for the Japanese DREAM promotion, where he fought in their inaugural Lightweight Grand Prix. Alvarez also fought once for ProElite's EliteXC.