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Release date: 10/29/2011 
Popularity: 1 
Original language: EN 
Add to favoritesUFC 137: Penn vs. Diaz
7Overview
UFC 137: Penn vs. Diaz was a mixed martial arts event held by the Ultimate Fighting Championship on October 29, 2011 at Mandalay Bay Events Center in Las Vegas, Nevada.
Alternative titles
UFC 137
Production companies
Trailers
UFC 137: Penn vs Diaz - Extended Preview
