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In a big upset, the former Dos Caras Jr., Alberto Del Rio, in his WWE debut cleanly defeated Rey Mysterio in the Smackdown main event with an arm bar. This is the biggest debut win given to a new WWE superstar I can remember since Carlito Caribbean Cool defeated John Cena for the United States title on the October 5th 2004 Smackdown TV tapings. Hopefully things turn out better for Del Rio in the long run than they did for Carlito, though I'm not holding my breath.