ALLEN PARK -- Matt Patricia can't officially accept the Detroit Lions' head coaching job for another 13 days, and he's already overhauling the defensive staff.

Linebackers coach Bill Sheridan and safeties coach Alan Williams have been told they will not return, according to reporting from the Detroit News at the Senior Bowl. That's in addition to coordinator Teryl Austin, who already took the same job in Cincinnati, and defensive line coach Kris Kocurek, who landed in Miami.

The exodus leaves just cornerbacks coach Tony Oden and quality control coach Steven Williams on the defensive staff, along with George Godsey, who handled special projects last year.

There have been no reports about who will replace any of them. GM Bob Quinn said the hire will have full autonomy over the staff.

As for the offensive side of the ball, all indications are Detroit will bring back Jim Bob Cooter as coordinator. Receivers coach Robert Prince, tight ends coach Al Golden, assistant special teams coach Devin Fitzsimmons and offensive assistant Evan Rothstein were all spotted by the Detroit News at Senior Bowl weigh-in, which suggests they'll return too.

The only offensive assistants known to be on their way out are line coach Ron Prince, who was already fired, and quarterbacks coach Brian Callahan.