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 defensive coordinator Jim Knowles left the Buckeyes program in a surprising turn of events, accepting the same job with the Penn State Nittany Lions