The transition of the Detroit Lions coaching staff appears to be continuing, even as the franchise must wait until after the Super Bowl to officially hire New England Patriots defensive coordinator Matt Patricia as its new head coach.

The Detroit Free Press and Detroit News reported Tuesday that linebackers coach Bill Sheridan and safeties coach Alan Williams will not be retained by the new staff, essentially continuing the overhaul of coaches on the defensive side of the ball.

Only cornerbacks coach Tony Oden, viewed as an up-and-coming coach around the league, remains with the Lions as far as position coaches on the defensive side. Former defensive coordinator Teryl Austin left for the Cincinnati Bengals, as did assistant defensive line coach Matt Raich. Defensive line coach Kris Kocurek departed for Miami -- and a reunion with Ndamukong Suh -- last week.

Most of Detroit’s offensive coaches are still under contract. The Lions fired offensive line coach Ron Prince along with head coach Jim Caldwell on Jan. 1. The MMQB is reporting that quarterbacks coach Brian Callahan is also leaving the Lions.

Callahan’s departure is a bit of a surprise. He had a good relationship with starting quarterback Matthew Stafford and a strong connection with offensive coordinator Jim Bob Cooter, who at least for now remains under contract with Detroit. Cooter and Callahan had worked together since their mutual time in Denver, where they shared an intern office. When Cooter was promoted to offensive coordinator with the Lions in 2015, Callahan was hired the following offseason as the team’s quarterbacks coach.

“We communicate well. I think we understand each other,” Callahan told ESPN in 2016 about the relationship with Cooter and the quarterbacks. “I think I understand what he wants from me, and I think that allows us to have a real good kind of energy between us, and then you put us with the quarterbacks and I think it all fits really, really well.”

The Detroit Free Press and Detroit News also reported that five assistants were among the group of Lions coaches and front-office personnel in Alabama for the Senior Bowl on Tuesday: receivers coach Robert Prince, tight ends coach Al Golden, offensive assistant Evan Rothstein, assistant special-teams coach Devin Fitzsimmons and coaching assistant Payton McCollum.