Kansas City Chiefs star running back Kenneth Walker won't play against the Atlanta Falcons on Sunday after he sustained a groin injury during Thursday's practice, a source told Adam Schefter of ESPN.
The Chiefs reportedly want to give Walker at least a week to recover.
Rookie Emmett Johnson will be Kansas City's RB1 in Atlanta with Walker sidelined.
Walker has recorded 1,044 all-purpose yards with a career-high 11 touchdowns through eight games this season. The 26-year-old's second in the NFL in rushing yards with 872, behind only Falcons star Bijan Robinson.
The reigning Super Bowl MVP joined the Chiefs in the offseason after winning a title with the Seattle Seahawks.
