Final Lineup For Tonight's UFC 137: "Penn vs. Diaz" Event

The following is the official lineup for tonight'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 television.

Facebook.com Preliminary Fights:

-Cliffard Starks vs. Dustin Jacoby

-Francis Carmont vs. Chris Camozzi

-Danny Downes vs. Ramsey Nijem

-Eliot Marshall vs. Brandon Vera

Spike TV Preliminary Fights:

-Bart Palaszewski vs. Tyson Griffin

-Donald "Cowboy" Cerrone vs. Dennis Siver

Pay-Per-View Fights:

-George Roop vs. Hatsu Hioki

-Jeff Curran vs. Scott Jorgensen

-Roy "Big Country" Nelson vs. Mirko "Cro Cop" Filipovic

-Nick Diaz vs. B.J. Penn

Make sure to check out WrestleZone's MMA sister-site, Sherdog.com tonight for the best UFC 137 coverage anywhere on the internet!