Canadian welterweight Sean Pierson (13-6 MMA, 3-2 UFC) has been forced out a planned UFC 158 matchup with Rick Story (14-6 MMA, 7-4 UFC), and Quinn Mulhern (18-2 MMA, 0-0 UFC) has been tapped as a replacement.
UFC officials today announced the change.
UFC 158 takes place March 16 at Montreal's Bell Centre. The main card airs on pay-per-view following prelims on FX and Facebook. Pierson vs. Story was slated for the evening's FX broadcast, but it's unknown if the new fight will keep that same slot.