Michigan Former Michigan Coach Greg Mattison Set To Retire Published January 22, 2021 After two seasons in Columbus before several in Ann Arbor, former DC and DL coach Greg Mattison is set to retire: Ohio State co-defensive coordinator Greg Mattison is retiring, Ryan Day just announced. pic.twitter.com/iHqyU5erNX — Tom VanHaaren (@TomVH) January 22, 2021 In this article: Recent Posts Top Michigan Pledge Hinting More Great Recruiting News On Way? Here’s When Bryce Underwood Is Signing With Michigan Michigan Pushing To Flip Two More Elite LSU Commits Once Predicted To Flip To Michigan, Top B1G Commit Now Back On Market SEC Program Predicted To Flip Five-Star Ohio State Commit