Michigan Mattison Shared Reason He Left For Ohio State Published February 6, 2019 Greg Mattison shared why he left Michigan for Ohio State: "Coach Harbaugh was great," Mattison said of telling Jim Harbaugh he was leaving for OSU. Said Harbaugh understood he wanted to be a DC again. — Aaron McMann (@AaronMcMann) February 6, 2019 In this article: Recent Posts Looks Like SEC School Has Overtaken Michigan To Flip A Top WR Committed To LSU One Of Nation’s Top Defenders Hinting A Michigan Commitment? Michigan Predicted To Flip One Of Clemson’s Top Commits OSU Starter Taking Note Of A Notable Comment Michigan Player Made After Win Last Year OSU Loses Another Top Recruit Ahead Of The Game