Perhaps the biggest coaching splash of the college football offseason, acclaimed defensive coordinator Jim Knowles left Ohio State for Big Ten rival Penn State after securing a national championship.

In a recent interview with ESPN, Jim Knowles detailed contract disputes that led to his departure from Ohio State football to Penn State.

Jim Knowles leaving Ohio State to join rival Penn State as defensive coordinator was one of the biggest moves of college football’s coaching carousel this offseason, and to hear him talk about it, the Buckeyes still had a chance to keep him around.