UFC 137: Penn vs Diaz — Results

Who won UFC 137: Penn vs Diaz?

Nick Diaz defeated BJ Penn by Unanimous Decision in round 3 (5:00) in the Welterweight main event of UFC 137: Penn vs Diaz, held Saturday, October 29, 2011 at Mandalay Bay Events Center, Las Vegas.

UFC 137: Penn vs Diaz is an MMA event from Ultimate Fighting Championship, scheduled for Saturday, October 29, 2011 at Mandalay Bay Events Center, Las Vegas, United States. The card streams as a Pay-Per-View. 137 is part of UFC's numbered event series. 11 fights are scheduled across the card.