Oscar Gutierrez (born December 11, 1974) better known by his ring name Rey Mysterio, is an American professional wrestler currently signe to World Wrestling Entertainment (WWE) wrestling on its SmackDown! brand, though he is currently inactive after tearing his biceps. He comes from a lucha libre family and has achieved success in heavyweight, cruiserweight and tag team divisions throughout his career. He is best known for his tenure with World Championship Wrestling (WCW) from 1996 to 2001 as well as a short-lived tenure with Extreme Championship Wrestling (ECW) in 1995.