(Pic) New UFC 137 poster for "Penn vs. Diaz" on Oct. 29 in Las Vegas, Nevada. The Halloween weekend event has been cursed from the get-go, starting as "St. Pierre vs. Diaz" before moving to "St. Pierre vs. Condit" and eventually settling on "Penn vs. Diaz." With any luck, the promotion will make it to next Saturday night without a hitch. For the complete updated UFC 137 fight card and line-up click here.