Athletic director Joe Castiglione said Thursday the OU football program is in the midst of searching for a defensive coordinator, and general manager.

Oklahoma's search for a defensive coordinator is a month old and reportedly targeting a Sun Belt Conference defensive coordinator. Who is Nate Drieling?

As Ohio State’s celebration tour for the school’s ninth national title continues, some of the Buckeyes’ key defensive players are grappling with the departure of their defensive coordinator. Jim Knowles decided to leave Columbus for Big Ten rival Penn State after three years at Ohio State,

Already boasting the largest salary among college football assistants, Knowles' contract allows him to hit astronomical numbers

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

Penn State has lured Tom Knowles away from Ohio State. The Nittany Lions have hired Knowles to serve as their defensive coordinator.

Penn State released a video of new defensive coordinator Jim Knowles meeting with the program after his hiring.

CBS Sports reports that Ohio State defensive coordinator Jim Knowles is leaving the Buckeyes to join James Franklin's staff at Penn State. Knowles is expected to be paid an average of $3.1 million over three years, according to ESPN . During Knowles' time at Ohio State, the Buckeyes ranked in the top three in total defense for two of those years.

Penn State made the hiring of new defensive coordinator Jim Knowles official on Monday. Here's what each had to say about the move

The Nittany Lions reportedly made the former Ohio State assistant college football's highest-paid defensive coordinator.

Knowles is a Philadelphia native and has made stops as defensive coordinator with Western Michigan, Duke, and Oklahoma State prior to his three seasons with Ohio State. The former Indiana coach said the move brings he and his wife closer to their two daughters.