Written by Matt Pargoff   

Spending the last eight years at Michigan, Mattison served as defensive coordinator under Brady Hoke, then was the lone holdover from that staff, working under Harbaugh as the defensive line coach.

A former assistant for Urban Meyer at Florida and John Harbaugh in Baltimore, he will team up with new Buckeyes’ head coach Ryan Day, serving as co-defensive coordinator with former San Francisco 49ers defensive backs coach Jeff Hafley.

This isn’t the first time that a Mattison departure from Ann Arbor left Michigan fans feeling a bit jilted, as he left following the 1996 season as defensive coordinator to take over in the same capacity at another rival, Notre Dame.

In total, Mattison spent 13 years as a member of the Michigan coaching staff, working with four different head coaches.

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