Óscar Gutiérrez ( born December 11 , 1974 ) , better known by the ring name Rey Mysterio , is an American professional wrestler of Mexican descent who currently works for Asistencia Asesoría y Administración ( AAA ) .
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 ) .