Buffalo Bills defensive end Von Miller underwent surgery Tuesday, head coach Sean McDermott told reporters Wednesday.
The surgery was exploratory and resulted in an unexpected ACL repair. He will be out for the season, the Bills announced.
Miller suffered the knee injury in Week 12 against the Detroit Lions. A Detroit offensive lineman hit his leg from the side on a pass play in the first half, and his leg was rolled up on as the play ended. He was carted off the field and soon ruled out for the game.