The Kansas City Chiefs announced Saturday that starting running back Kenneth Walker III will miss Sunday’s game against the Atlanta Falcons after aggravating his groin during Thursday’s practice.

The Chiefs want to give Walker a week, ESPN’s Adam Schefter reported, citing a source.

Walker ranks second in the NFL with 872 rushing yards and second with 5.5 yards per carry this season. He has scored 11 total touchdowns and surpassed 100 rushing yards in five of his eight games.

Rookie running back Emmett Johnson has 26 carries for 111 yards and a rushing touchdown, along with 14 receptions for 237 yards and a receiving touchdown. Kansas City is also elevating running back Nate Carter to the active roster.

Chiefs rule Kenneth Walker III out against Falcons with groin injury

Jaydn Ott is questionable with a hamstring injury. He had three carries for 19 yards in his NFL debut last week.

The Chiefs are seeking consecutive wins for the first time since their 5-0 start. Kickoff in Atlanta is scheduled for noon Central time Sunday.