Chicago Bears running back David Montgomery is expected to miss approximately one month of play due to a left knee injury he sustained in the Bears Week 4 win over the Detroit Lions. Montgomery ran for 106 yards and two scores on 23 carries in the Bears’ win over the Lions on Sunday in Chicago, but left the game in the fourth quarter and did not return. At the time, Bears coach Matt Nagy told reporters on Sunday that he “didn’t know” enough about Montgomery’s injury when asked for an update at his postgame news conference.

Damien Williams is expected to start for the Bears at running back in Week 5. Khalil Herbert, the third-string running back, will likely back up Williams until Montgomery returns. Williams totaled 70 yards from scrimmage and a touchdown on 10 touches in Week 4. He sustained a thigh bruise Sunday, but is expected to be available.

The Bears (2-2) battle the Las Vegas Raiders (3-1) at 4:05 p.m. EDT Sunday in Paradise, Nevada.

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