Óscar Gutiérrez Rubio, better known by the ring name Rey Mysterio, is a Mexican-American professional wrestler who currently works for Asistencia Asesoría y Administración. He is best known for his time in WWE. He is also known for his work in Extreme Championship Wrestling and World Championship Wrestling. Gutierrez was trained by his uncle Rey Misterio, Sr., learning the Lucha Libre high flying style that has been his trademark. Gutierrez originally worked for AAA in Mexico, from 1992 to 1995. He wrestled in ECW from 1995 to 1996 and WCW from 1996 to 2001 as Rey Misterio Jr. or Rey Mysterio Jr., but dropped the "Junior" from his name when he ... more on Wikipedia