UFC officials have announced that welterweight prospect Gunnar Nelson is forced to withdraw from his fight against Mike Pyle due to an knee injury suffered in training.

Rick Story will be Nelson’s replacement, and take on Pyle at UFC 160.

Story is only 2-3 in his last five bouts, but was riding a six fight win streak before dropping back to back fights to Charlie Brenneman and Martin Kampmann. He is coming off a first round TKO victory over Quinn Mulhern last month at UFC 158 in Canada.

Pyle is 7-3 in his last ten fights and is currently riding a three fight win streak all of which first round KO/TKO’s over the likes of Ricardo Funch, Josh Neer, and James Head. Besides his UFC debut loss to Brock Larson, Pyle’s only other defeats inside the octagon have come to top contenders Jake Ellenberger, and Rory MacDonald.

UFC 160 is set to take place on May 25, at the MGM Grand Garden Arena in Las Vegas, Nevada. The card will be headlined by the rematch of UFC heavyweight champ Cain Velasquez, and Antonio “Bigfoot” Silva.

Photo By: Eric Bolte – USA Today Sports