Both the Green Bay Packers and Detroit Lions will open Week 1 at Lambeau Field with new centers in the middle of their respective offensive lines.
The Packers lost multi-year starter Josh Myers in free agency and are expected to move veteran Elgton Jenkins from left guard to center.
The Lions are losing veteran and four-time All-Pro Frank Ragnow, who is planning to retire from professional football, according to reporting from Ian Rapoport of NFL Network on Monday.
Changing centers can create a difficult adjustment. Not only does the center touch the ball every play, but there is an important connect between the center and quarterback, both in terms of hiking/snapping the ball and setting protections for the offensive line before the snap.