Shane Carwin pulls out of bout

Updated: October 27, 2010, 10:44 AM ET
Associated Press

LAS VEGAS -- UFC heavyweight contender Shane Carwin says he's pulling out of a high-profile New Year's Day bout with a back injury.

Carwin (12-1) announced his decision on his blog Tuesday. He was expected to fight Roy Nelson in the co-main event at UFC 125 in the MGM Grand Garden.

He says he has unspecified damage to his back that may require surgery.

Carwin was unbeaten until his second-round submission loss to Brock Lesnar last July.

The UFC has no obvious replacement for Carwin in his fight against Nelson, which could have set up the winner with a chance to face new heavyweight champion Cain Velasquez later in 2011.

Frankie Edgar will defend his UFC lightweight title against Gray Maynard in the main event at UFC 125.

Copyright 2010 by The Associated Press