HENDERSON, Nev. (AP) — Raiders left tackle Kolton Miller was placed on injured reserve because of an ankle injury, the club announced Tuesday, a move that deprives Las Vegas of its best offensive lineman for at least four games.

Miller has a high ankle sprain, a person with knowledge of the injury told The Associated Press. The person spoke on condition of anonymity because the Raiders had not provided a medical update.

A CT scan also showed that Miller suffered a hairline fracture, according to NFL Network.

Miller was injured with 43 seconds left in the Raiders’ 25-24 loss to Chicago on Sunday.

It’s a significant loss for an offensive line that struggled the first three weeks before playing its best game against the Bears.

Stone Forsythe, who started 14 games over his first four

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