On Saturday, October 29, 2011, 6pm PT/9pm ET B.J. "The Prodigy" Penn will take on Nick Diaz at the at Mandalay Bay Events Center in Las Vegas, Nevada.Main CardPenn vs DiazKongo vs MitrioneCro Cop vs NelsonJorgensen vs CurranHioki vs RoopPrelimsSiver vs CerroneGriffin vs PalaszewskiVera vs MarshallNijem vs DownesCamozzi vs CarmontJacoby vs StarksWatch UFC 137: Penn vs. Diaz live online 6PT/9pm ET. See broadcasters below.Please note: This event is not available in the UK, Denmark, Finland, Norway, Greece, Ireland, Italy and Sweden.