After the Michigan Wolverines' Peach Bowl loss against Florida last month, head coach Jim Harbaugh said he didn't anticipate any changes on his coaching staff this offseason.
Expect the unexpected, as they say.
Michigan defensive line coach Greg Mattison accepted an offer from Ohio State to be its new co-defensive coordinator, along with San Francisco 49ers defensive backs coach Jeff Hafley, according to an Ohio State press release. Former Ohio State defensive coordinator Greg Schiano was not returning to the team under new head coach Ryan Day, according to the 247Sports Ohio State affiliate .
Mattison was the defensive coordinator for Michigan from 2011-14 under former head coach Brady Hoke. He was retained when Harbaugh was hired as the head coach and served as the defensive line coach from 2015-18. Mattison was also the defensive line coach at Michigan from 1992-94 and the defensive coordinator from 1995-96.
Two defensive linemen from Michigan are expected to be drafted in this year's NFL Draft — Rashan Gary and Chase Winovich.
According to 97.1 The Ticket's Mike Sullivan, defensive linemen on the team were contacted by Mattison yesterday that he would not be returning to the program.
From what I've heard, Greg Mattison called his defensive linemen yesterday and told them he's leaving to go coach at Ohio State. He had an expiring contract and told them Jim Harbaugh and Don Brown chose not to renew it. He'll be the DC at Ohio State.
— Mike Sullivan (@MikeSullivan) January 7, 2019
Mattison has also had coaching stops at Northwestern, Western Michigan, Navy, Texas A&M, Notre Dame, Florida and the NFL's Baltimore Ravens.