The Chiefs have promoted former Minnesota Viking head coach Brad Childress to assistant head coach and announced that Matt Nagy will take over as the sole offensive coordinator in a minor shake-up of Andy Reid’s staff.

Childress and Nagy served as co-offensive coordinators last season. Their new roles were announced Monday.

Childress takes over from David Culley, who served as assistant head coach and wide receivers coach last season. Culley left in the offseason to be the quarterbacks coach in Buffalo.

The Chiefs already have hired Greg Lewis to work with wide receivers.

Nagy began his coaching career with Reid in Philadelphia, then followed him to Kansas City as the quarterbacks coach. Last year was his first as co-offensive coordinator.