Herbert will miss at least four games. He was hurt returning a kickoff near the end of last week's 31-30 loss to the Detroit Lions.
Herbert is the team's second-leading rusher behind quarterback Justin Fields. He has 643 yards on 108 attempts while sharing duties with David Montgomery. He is sixth in the league at 6 yards per carry. Chicago is averaging 201.7 yards rushing, with the Baltimore Ravens second at 168.1 yards per game.
Chicago visits Atlanta on Sunday. The Bears (3-7) have lost six of seven.
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