Rey Mysterio wrestled professionally.
Óscar Gutiérrez ( born December 11 , 1974 ) , better known by his ring names Rey Mysterio Jr , or simply Rey Mysterio , is a Mexican-American professional wrestler . `` Rey Misterio '' is Spanish for `` King Mystery '' , but subsequently dropped the `` Junior '' from his name when he began working for WWE in July 2002 until February 2015 . In WWE , Mysterio is a three-time world champion , having held WWE 's World Heavyweight Championship twice and the WWE Championship once . He has also held the WWE Tag Team Championship a record-tying four times , and the WWE Intercontinental Championship twice .