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Video: UFC 137: Penn Vs. Diaz Trailer

The UFC has re-worked the trailer video for UFC 137, which features a new main event of BJ Penn vs. Nick Diaz.

The planned main event of UFC welterweight champion Georges St-Pierre vs. Carlos Condit was scratched due to a knee injury by St-Pierre.

UFC 137: Penn vs. Diaz takes place October 29 from Las Vegas, Nevada live on pay-per-view. Along with Penn vs. Diaz, Matt Mitrione will meet Cheick Kongo in the co-main event, and heavyweights Roy Nelson and Mirko “CroCop” Filpovic will face off.