Muñoz was one of the chosen few to be relocated to WEC's sister promotion—which is also owned and produced by Zuffa—along with light heavyweight champion Steve Cantwell, light heavyweight contenders Brian Stann and Steve Steinbeiss and middleweight contenders Chael Sonnen and Nissen Osterneck.
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Muñoz defeated Chris Leben, in the first 5 round non title fight in UFC history, on November 5, 2011 by corner stoppage at UFC 138.
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