Chiefs rule out Kenneth Walker, NFL's No. 2 rusher, for Sunday's game in Atlanta with a groin injury

(AP) — The Chiefs have ruled Kenneth Walker out of Sunday's game in Atlanta because of a groin injury, leaving them with rookie running back Emmett Johnson, ailing youngster Jaydn Ott and journeyman Nate Carter against Bijan Robinson and the Falcons.The Chiefs made the announcement Saturday, one…