Greg Mattison is retiring after nearly five decades in coaching. Mattison, who spent the past two seasons as the defensive co-coordinator at Ohio State, will leave the program at the end of January. He turned 71 in November. In announcing the news during a Zoom call with reporters on Friday, coach Ryan Day praised him for an “unbelievable career” and called him a “special guy.” He was hired as a part of Day’s original coaching staff in 2019, poached from Michigan alongside linebackers coach Al Washington. Mattison had spent 13 seasons over two separate stints with the Buckeyes’ archrival, but also worked alongside Day when they were at Florida together in 2005. Day was a graduate assistant for the Gators, while Mattison coordinated the defense. See omnystudio.com/listener for privacy information.