Óscar Gutiérrez (born December 11, 1974) better known by his ring name Rey Mysterio, is an Mexican-American professional wrestler. He is currently working for Asistencia Asesoría y Administración (AAA). He is best known for his time in the WWE. He wrestled for Extreme Championship Wrestling (ECW) from 1995 to 1996, World Championship Wrestling (WCW) from 1996 to 2001, and the World Wrestling Entertainment/WWE from 2002 to 2015. Gutierrez is a devout Roman Catholic and crosses himself before every match.