![UFC fighters Nick Diaz, right, and BJ Penn, left, square off during a weigh-in for UFC 137 in Las Vegas, Nevada on Friday, October 28, 2011. Photo by Francis Specker Stock Photo - Alamy UFC fighters Nick Diaz, right, and BJ Penn, left, square off during a weigh-in for UFC 137 in Las Vegas, Nevada on Friday, October 28, 2011. Photo by Francis Specker Stock Photo - Alamy](https://c8.alamy.com/comp/HBFHGG/ufc-fighters-nick-diaz-right-and-bj-penn-left-square-off-during-a-HBFHGG.jpg)
UFC fighters Nick Diaz, right, and BJ Penn, left, square off during a weigh-in for UFC 137 in Las Vegas, Nevada on Friday, October 28, 2011. Photo by Francis Specker Stock Photo - Alamy
![UFC on Twitter: "Penn. Diaz. FREE FIGHT. Watch it here: http://t.co/ex20lERnO5 #UFC183: Silva vs Diaz Jan. 31 live on Pay-Per-View http://t.co/Pvkc5yWvmo" / Twitter UFC on Twitter: "Penn. Diaz. FREE FIGHT. Watch it here: http://t.co/ex20lERnO5 #UFC183: Silva vs Diaz Jan. 31 live on Pay-Per-View http://t.co/Pvkc5yWvmo" / Twitter](https://pbs.twimg.com/media/B7GddpSCIAEqETV.jpg)
UFC on Twitter: "Penn. Diaz. FREE FIGHT. Watch it here: http://t.co/ex20lERnO5 #UFC183: Silva vs Diaz Jan. 31 live on Pay-Per-View http://t.co/Pvkc5yWvmo" / Twitter
![Amazon.com: UFC 137 & 138: Penn vs. Diaz and Leben vs. Munoz : BJ Penn, Nick Diaz, Chris Leben, Mark Munoz, Not Provided: Movies & TV Amazon.com: UFC 137 & 138: Penn vs. Diaz and Leben vs. Munoz : BJ Penn, Nick Diaz, Chris Leben, Mark Munoz, Not Provided: Movies & TV](https://m.media-amazon.com/images/I/817sjnA0RRL._AC_UF894,1000_QL80_.jpg)
Amazon.com: UFC 137 & 138: Penn vs. Diaz and Leben vs. Munoz : BJ Penn, Nick Diaz, Chris Leben, Mark Munoz, Not Provided: Movies & TV
![B.J. Penn's Camp Reveals Why He's Lost Respect for Nick Diaz | News, Scores, Highlights, Stats, and Rumors | Bleacher Report B.J. Penn's Camp Reveals Why He's Lost Respect for Nick Diaz | News, Scores, Highlights, Stats, and Rumors | Bleacher Report](https://cdn.bleacherreport.net/images_root/article/media_slots/photos/000/298/430/penndiaz_crop_340x234.jpg?1326146253)