Roschon Johnson, running back for the Chicago Bears, did not participate in Thursday's practice due to a concussion. He entered concussion protocol after being removed from the previous game and has not made significant progress in his recovery. Johnson will likely need to participate in practice on Friday and gain clearance from a neurologist in order to have a chance at playing on Sunday against the Vikings. Khalil Herbert and Travis Homer have also been absent from practice and are likely to miss the game, leaving D'Onta Foreman as the lead running back for the Bears.