Michigan State University football coach Mark Dantonio is retiring after a 13-year run.
Defensive coordinator Mike Tressel will be the acting head coach while Michigan State seeks a replacement.
Dantonio has more wins than any other coach in the program's history. He also won three Big Ten championships, a Rose Bowl and an appearance in the College Football Playoff.
In a statement first released on social media, Dantonio said his retirement "marks one of the most difficult decisions that I have ever made here at Michigan State."