The infamous injury epidemic has returned once again, this time claiming Rory MacDonald as its victim, forcing him out of his UFC 158 rematch with Carlos Condit.  MMA Fighting‘s Ariel Helwani first broke the news. MacDonald (14-1) most recently put a three-round thumping on former champion B.J. Penn at UFC on Fox 5 in December. […]MMAFrenzy.com