Ohio State co-defensive coordinator Greg Mattison is retiring, coach Ryan Day said Friday.
Mattison, 71, has shared coordinator duties the past two seasons at Ohio State after joining the staff from archrival Michigan in January 2019. He twice served as the Wolverines' defensive coordinator and also held coordinator roles at Florida, Notre Dame and Western Michigan and with the Baltimore Ravens in 2009 and 2010.
Day said he is working to find a replacement for Mattison, who shared coordinator duties with primary playcaller Kerry Coombs in 2020 and with Jeff Hafley in 2019.