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.

• Director?
• Release29 October 2011
• Genre?
• Duration2h 51m
• Budget?
• Revenue?
• Rate
  

  6.8
  5 reviews
• Productions

  Zuffa