Jim Knowles made college football history over the weekend, becoming the highest paid defensive coordinator ever when he jumped from Ohio State to Penn State for a salary that will reportedly top $3 million per year.

As Ryan Day looks to hire his fourth defensive coordinator in seven seasons, here are potential candidates to replace Jim Knowles.

Ohio State’s national title celebration was missing a notable face on Sunday, as Buckeye Nation shortly learned that defensive coordinator Jim Knowles was leaving Columbus to take the same position at Penn State.