Former offensive coordinator Ben Johnson is off to Chicago to lead the Bears. Former defensive Aaron Glenn is now the head coach of the New York Jets. Both will be missed in Detroit, but Campbell and company must move forward with the assistants remaining. That process has already begun.

Co-defensive coordinator with Luke Fickell for Ohio State’s 2014 national champions, Chris Ash helped coach Urban Meyer’s Buckeyes go 26-2 in 2014-15.

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.

Steve Wilks, who ran the Niners' defense in 2023 and was head coach of the Cardinals in 2018, has agreed to become the Jets' defensive coordinator, sources told ESPN.

The former Arizona Cardinals head coach has been selected by new New York Jets head coach Aaron Glenn to become Gang Green's defensive coordinator per NFL insider Tom Pelissero.

Days after Al Golden left to become the defensive coordinator of the Cincinnati Bengals, the Fighting Irish have hired former Rutgers coach Chris Ash to be their new defensive coordinator, according to ESPN's Pete Thamel. Ash has been in the NFL since the start of the 2021 season and worked as a scout for the Jacksonville Jaguars in 2024.

New Jets head coach Aaron Glenn is set to add an experienced assistant to his staff as the defensive coordinator.

Look back at some of the best photos of defensive coordinator Robert Saleh's first stint with the San Francisco 49ers. Look back at some of the best San Francisco 49ers defensive line photos throughout the 2024 season. DL Maliek Collins, DL Sam Okuayinonu, DL Leonard Floyd, Defensive Line Coach Kris Kocurek, DL Nick Bosa

The first assistant coach has been hired for the New York Jets under head coach Aaron Glenn. It wasn't the defensive coordinator position or the offensive play-caller role. Each is being closely watched around the league at this point.