Sean Pierson will not get a chance after all to fight in his home of Canada. Pierson was set to meet fellow welterweight Rick Story at UFC 158. Stepping in for Pierson will be UFC newcomer and Strikeforce veteran Quinn Mulhern (18-2). Mulhern went (3-1) under the Strikeforce banner, only lost to Jason High. Mulhern is meeting rick Story who is in a must win situation. Story has gone (1-3) in his last four fights. A win for Mulhern could sky rocket his career, but a win for Story could save his.