Rey Mysterio is a teacher.
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 . He is best known for his long tenure in WWE from July 2002 to February 2014 . He is also known for his work in Extreme Championship Wrestling ( ECW ) , AAA , and World Championship Wrestling ( WCW ) . Mysterio is known for having a high flying style , which helped kick-start the cruiserweight wrestling revolution in the United States in the late 1990s during his time in WCW , and is often regarded as one of the greatest high-flyers in wrestling history . He was the 21st person to complete the WWE Triple Crown , and was the winner of the 2006 Royal Rumble .