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.

The Lions already hired Kacy Rodgers as the new run game coordinator and defensive line coach. Rodgers is taking over for Terrell Williams, who left Detroit to become the defensive coordinator of the New England Patriots. Read all the best Lions coverage at the Detroit Free Press and Lions Wire.

Detroit has promoted former linebackers coach Kelvin Sheppard to replace Aaron Glenn in the vacant coaching role, a source confirmed to ESPN's Jeremy Fowler.