Michigan defensive line coach Greg Mattison, who once left the program to coach rival Notre Dame, has left again, this time for the Wolverines’ biggest rival, Ohio State.
Mattison, 69, will join first-year OSU coach Ryan Day’s staff as co-defensive coordinator, the school confirmed Monday. Mattison will share the job with San Francisco 49ers defensive backs coach Jeff Hafley.
There has been no comment from Michigan coach Jim Harbaugh or a program spokesman.
"I love the idea of having two coordinators on defense,” Day said in a statement released by Ohio State. “I like having a diversity of opinion, but even more I like the expertise and experience that Jeff has in the secondary coupled with the expertise that Greg brings to the front seven.