by Ken Pishna – MMAWeekly.com
Rob Kimmons has been forced to withdraw from a proposed welterweight match-up with Mike Pierce at UFC on Versus 1. He reportedly has some sort of unconfirmed leg injury and will be replaced by UFC newcomer Julio Paulino.

Kimmons’ withdrawal was first reported by MMAJunkie.com. MMAWeekly.com subsequently confirmed the replacement with sources close to the bout.

Pierce (10-3) is coming off of a loss to No. 2 ranked welterweight Jon Fitch in his last outing. He defeated Brock Larson in his Octagon debut in September of last year.

A staple of the Alaska Fighting Championship promotion, Paulino (17-2) makes his Octagon debut against Pierce. He enters the bout riding a seven-fight winning streak. His most recent bout was a victory over UFC veteran Rob Yundt in early February.

A light heavyweight bout between Jon Jones and Brandon Vera headlines UFC on Versus 1 at the 1stBank Center in Broomfield, Colo.