The pay-per-view event, which features a welterweight headliner between former UFC champ B.J. Penn and ex-Strikeforce titleholder Nick Diaz, takes place at Las Vegas' Mandalay Bay Events Center.
Official results beginning at approximately 5:45 p.m. ET (2:45 p.m. PT local time) for the preliminary card and 9 p.m. ET for the main card.
In addition to the night's main card – which also features heavyweight bouts of Matt Mitrione vs. Cheick Kongo and Roy Nelson vs. Mirko "Cro Cop" Filipovic – UFC 137 features a two-bout "UFC Prelims" special on Spike TV and an additional four fights that stream on Facebook.
PRELIMINARY CARD: (Facebook @ 6pm est.)Middleweight bout: Dustin Jacoby vs. Clifford Starks -
Clifford Starks via Unanimous Decision (30-27, 30-27, 30-27)Middleweight bout: Chris Camozzi vs. Francis Carmont -
Francis Carmont via unanimous decision (30–26, 30–27, 30–27)Lightweight bout: Ramsey Nijem vs. Danny Downes -
Ramsey Nijem via unanimous decision (30–25, 30–26, 30–27)Light Heavyweight bout: Brandon Vera vs. Eliot Marshall -
Brandon Vera via unanimous decision (29–28, 29–28, 29–28)PRELIMINARY CARD: (Spike TV @ 8pm est.)Catchweight (148lb) bout: Tyson Griffin vs. Bart Palaszewski -
Bart Palaszewski via KO (punches) at 2:45 of round 1Lightweight bout: Dennis Siver vs. Donald Cerrone -
Donald Cerrone via submission (rear naked choke) at 2:22 of round 1MAIN CARD:Featherweight bout: Hatsu Hioki vs. George Roop -
Hatsu Hioki via split decision (29–28, 28–29, 29–28)Bantamweight bout: Scott Jorgensen vs. Jeff Curran -
Scott Jorgensen via unanimous decision (29–28, 29–28, 30–27)Heavyweight bout: Mirko Filipovic vs. Roy Nelson -
Roy Nelson via TKO (punches) at 1:30 of round 3CO - MAIN EVENT:Heavyweight bout: Cheick Kongo vs. Matt Mitrione -
Cheick Kongo via unanimous decision (30–27, 29–27, 29–28)MAIN EVENT:Welterweight bout: B.J. Penn vs. Nick Diaz -
Nick Diaz via unanimous decision (29-28, 29-27, 29-28)