By MATT BOONE
MMANEWS.COM Staff Writer

The following are results from the official weigh-ins for Saturday's UFC 137: "Penn vs. Diaz" event, which emanates from the Mandalay Bay Events Center in Las Vegas, Nevada and airs live on Facebook.com, Spike TV and pay-per-view.

Facebook.com Preliminary Fights:

-Cliffard Starks (186 lbs.) vs. Dustin Jacoby (185 lbs.)
-Francis Carmont (185 lbs.) vs. Chris Camozzi (185 lbs.)
-Danny Downes (155 lbs.) vs. Ramsey Nijem (155 lbs.)
-Eliot Marshall (204 lbs.) vs. Brandon Vera (205 lbs.)

Spike TV Preliminary Fights:

-Bart Palaszewski (146 lbs.) vs. Tyson Griffin (149 lbs.)*
-Donald Cerrone (156 lbs.) vs. Dennis Siver (155 lbs.)

Pay-Per-View Fights:

-George Roop (145 lbs.) vs. Hatsu Hioki (145 lbs.)
-Jeff Curran (134 lbs.) vs. Scott Jorgensen (135 lbs.)
-Roy "Big Country" Nelson (252 lbs.) vs. Mirko "Cro Cop" Filipovic (235 lbs.)**
-Matt Mitrione (255 lbs.) vs. Cheick Kongo (234 lbs.)
-Nick Diaz (170 lbs.) vs. B.J. Penn (169 lbs.)***

* Tyson Griffin weighed in at 149 lbs. for his first attempt. Griffin is being given one hour to lose three pounds.

** Roy Nelson weighed in officially at 252, but was wearing some sort of fat suit, so his actual weight is technically unknown, I suppose.

*** During the Diaz-Penn staredown, Diaz ducked his head down, pushed it into Penn's head and the two had a pull-apart, including Diaz somewhat swatting at Penn's face with his hand. Diaz immediately left, not sticking around for the typical post-weigh in interview. Penn remained on stage, but gave a quick one-sentence response in his interview. Intense stuff!

UPDATE: Tyson Griffin fails to make weight. Bart Palaszewski agrees to 148-pound catch weight bout. Read the full story here: Griffin Fails To Make Weight, Palaszewski Agrees To Catch-Weight Bout

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