Former Ohio State defensive coordinator Jim Knowles abruptly ended his time with the Buckeyes to join Penn State Jan. 26, ...

Ryan Day and Jim Knowles have a long history together, but for Day, him seeing Jim Knowles at Penn State doesn't bother him.

Are the former Buckeyes co-workers interacting with one another? Especially before Ohio State takes on Penn State?

Ohio State-Penn State is not the marquee matchup many expected. Will Knowles and the Nittany Lions have any surprises in ...

Ohio State's game against Penn State marks the return of former defensive coordinator Jim Knowles, now in the same position ...

Dust off the ‘D’ word. Give it a shine. We’re nearly ready to use it again. This time, for Ohio State. Dynasty.

Jim Knowles left Ohio State football for Penn State in January. Here's what coach Ryan Day said about the "abrupt" departure.

CBS Sports is a registered trademark of CBS Broadcasting Inc. Commissioner.com is a registered trademark of CBS Interactive Inc.

Then there is the elephant in the room in Jim Knowles, the former Ohio State defensive ... after helping lead the Buckeyes to ...

Ryan Day said “there really hasn’t been much communication” with Jim Knowles since Knowles left for Penn State, but “we ...

How Jim Knowles' abrupt departure to a conference rival has added personal stakes to Ohio State's matchup with Penn State, potentially leading to an aggressive game plan ...

Ohio State head coach Ryan Day addressed questions about his relationship with former defensive coordinator Jim Knowles, and ...