Knowles would join James Franklin's Penn State staff after three seasons at Ohio State, where he won a national championship.

Mike Zimmer, who spent last season as the Dallas Cowboys' defensive coordinator, said he will not be returning to the team on new head coach Brian Schottenheimer's staff and likely will retire from coaching in the NFL,

The Lions are promoting linebackers coach Kelvin Sheppard to defensive coordinator. Here are some things to know about Sheppard.

Dennis Allen was fired as the Saints head coach on Nov. 3 and will now run the defense for new coach Ben Johnson in Chicago.

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.

This New Orleans Saints coach candidate has a big name in mind for his defensive coordinator. Mike Kafka reportedly wants to bring Wink Martindale with him:

Penn State has hired Jim Knowles as defensive coordinator after he helped Ohio State win the national championship, according to multiple reports. The Buckeyes had hoped to keep the 59-year-old Knowles, who also was pursued by Oklahoma and Notre Dame.

According to multiple reports, they will hire Dennis Allen as their defensive coordinator and Declan Doyle as their offensive coordinator. Those reports also indicate that the team will retain special teams coordinator Richard Hightower.

According to reports, Penn State is finalizing a deal to lure defensive coordinator Jim Knowles away from Ohio State.

Penn State football reportedly will make former Ohio State Buckeye Jim Knowles the highest-paid assistant coach in the nation.

The Cowboys have completed an interview with a candidate for defensive coordinator. Todd Archer of ESPN.com reports that they have interviewed Andre Curtis for the position. Curtis spent the last three seasons as the safeties coach for the Bears.