Óscar Gutiérrez (born December 11, 1974), better known by his ring name Rey Mysterio, is an American professional wrestler. He is currently signed to WWE. He wrestles on the SmackDown brand. Mysterio is often said to be one of the greatest professional wrestlers of all time. He is credited for making cruiserweight wrestling popular. Mysterio is one of the world's most recognizable "lucha libre" wrestlers.