What happened: The Kansas City Chiefs ruled out running back Kenneth Walker III for Sunday's road contest at Atlanta. He had been downgraded on the team's official Sunday morning status update.

Why it matters: His absence forces Kansas City to alter its offensive backfield rotation on the road. Atlanta's defense now faces a Kansas City rushing attack operating without its primary back.

What to watch: Kickoff between the Chiefs and Falcons is scheduled for Sunday at 1:00 PM ET in Atlanta.