FC 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.The event was originally expected to take place on October 15, 2011 at the Echo Arena Liverpool in Liverpool, England. However, due to multiple scheduling issues with broadcast rights, the organization cancelled those plans. UFC 137 featured two preliminary fights live on Spike TV. Dennis Siver was expected to face Sam Stout at this event, but Stout pulled out of the bout on August 29 and was replaced by Donald Cerrone.
Nick Diaz, who was originally scheduled to headline the card opposite Georges St-Pierre for the UFC Welterweight Championship, was pulled from the fight on September 7, due to failing to make media appearances. Carlos Condit was promoted from his fight with B.J. Penn to replace Diaz and face St-Pierre.On September 8, B.J. Penn announced via Twitter that Dana White offered him a fight he "cannot refuse" and will still be fighting at UFC 137. Later that day, both Penn and White announced that the fight would be against Nick Diaz.
On October 1, it was revealed that Tim Credeur was forced out of his bout with Brad Tavares for unknown reasons. Promotional newcomer Dustin Jacoby stepped in to face Tavares. On October 21st, Tavares pulled out of the bout due to an injury and was replaced by undefeated newcomer Clifford Starks.Georges St. Pierre was expected to defend his title against Carlos Condit on this card, but had to withdraw due to knee injury. Nick Diaz vs. B.J. Penn was promoted to the main event.
During the official UFC 137 weigh ins, Tyson Griffin failed to make the featherweight limit. Griffin came in 3 pounds over, was fined 25 percent of his earnings and the bout took place at a catchweight of 148lb.
Middleweight bout: United States Dustin Jacoby vs. United States Clifford Starks
Starks defeated Jacoby via unanimous decision (30–27, 30–27, 30–27).
Middleweight bout: United States Chris Camozzi vs. France Francis Carmont
Carmont defeated Camozzi via unanimous decision (30–26, 30–27, 30–27).
Lightweight bout: United States Ramsey Nijem vs. United States Danny Downes
Nijem defeated Downes via unanimous decision (30–25, 30–26, 30–27).
Light Heavyweight bout: United States Brandon Vera vs. United States Eliot Marshall
Vera defeated Marshall via unanimous decision (29–28, 29–28, 29–28). This fight aired on the Spike broadcast after the Siver vs. Cerrone fight.
Preliminary card (televised)
Catchweight (148 lb) bout: United States Tyson Griffin vs. Poland Bart Palaszewski
Palaszewski defeated Griffin via KO (punches) at 2:45 of round 1.
Lightweight Bout: Germany Dennis Siver vs. United States Donald Cerrone
Cerrone defeated Siver via submission (rear naked choke) at 2:22 of round 1. This fight aired on the PPV broadcast after the Penn vs. Diaz fight.
Featherweight bout: Japan Hatsu Hioki vs. United States George Roop
Hioki defeated Roop via split decision (29–28, 28–29, 29–28).
Bantamweight bout: United States Scott Jorgensen vs. United States Jeff Curran
Jorgensen defeated Curran via unanimous decision (29–28, 29–28, 30–27).
Heavyweight bout: Croatia Mirko Filipović vs. United States Roy Nelson
Nelson defeated Filipović via TKO (punches) at 1:30 of round 3.
Heavyweight bout: France Cheick Kongo vs. United States Matt Mitrione
Kongo defeated Mitrione via unanimous decision (30–27, 30–28, 29–28).
Welterweight bout: United States BJ Penn vs. United States Nick Diaz
Diaz defeated Penn via unanimous decision (29–28, 29–27, 29–28).
Fighters were awarded $75,000 bonuses.
Fight of the Night: United States BJ Penn vs. United States Nick Diaz
Knockout of the Night: Poland Bart Palaszewski
Submission of the Night: United States Donald Cerrone
The following is the reported payout to the fighters as reported to the The Nevada State Athletic Commission. It does not include sponsor money or "locker room" bonuses often given by the UFC and also do not include the UFC's traditional "fight night" bonuses.
Nick Diaz: $200,000 (no win bonus) def. BJ Penn: $150,000
Cheick Kongo: $140,000 ($70,000 win bonus) def. Matt Mitrione: $10,000
Roy Nelson: $40,000 ($20,000 win bonus) def. Mirko Filipović: $75,000
Scott Jorgensen: $33,000 ($16,500 win bonus) def. Jeff Curran: $8,000
Hatsu Hioki: $30,000 ($15,000 win bonus) def. George Roop: $8,000
Donald Cerrone: $54,000 ($27,000 win bonus) def. Dennis Siver: $27,000
Bart Palaszewski: $28,500 ($10,000 win bonus) def. Tyson Griffin: $25,500
Brandon Vera: $120,000 ($60,000 win bonus) def. Eliot Marshall: $15,000
Ramsey Nijem: $20,000 ($10,000 win bonus) def. Danny Downes: $5,000
Francis Carmont: $12,000 ($6,000 win bonus) def. Chris Camozzi: $8,000
Clifford Starks: $12,000 ($6,000 win bonus) def. Dustin Jacoby: $6,000
Although not recognized on the official pay sheet, Griffin was fined $8,500, or 25% of his base pay for missing weight for the fight, and contracts were reworked with those amounts. That money was issued to Palaszewski, an NSAC official confirmed.