Sean Pierson Out, Quinn Mulhern In Against Rick Story At UFC 158

Sean Pierson has pulled out of his UFC 158: St-Pierre Vs Diaz bout with Rick Story. UFC officials have confirmed that the Canadian welterweight will be replaced by Quinn Mulhern. Mulhern will be making his Octagon debut after a four fight run in Strikeforce. It’s unclear as to if the bout will  remain on the FX portion of the fight card.