UFC bantamweight Mitch Gagnon took to Facebook yesterday to announce that he would not be fighting Issei Tamura at UFC 158: St-Pierre vs. Diaz in Montreal. It is now being reported that T.J. Dillashaw has stepped up to take the fight in Gagnon‘s place. The Canadian Press was the first to report the new opponent.”¦The post T.J. Dillashaw Replaces Gagnon Against Issei Tamura at UFC 158 appeared first on Fighters.com.