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Another setback for 49ers DL Armstead

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It’s a new year, but the same story for 49ers defensive lineman Arik Armstead after four training-camp practices: He’s injured.

After missing 18 games the past two seasons, Armstead has sustained what head coach Kyle Shanahan termed a “somewhat” serious hamstring injury and is expected to miss multiple weeks.

In 2016, Armstead sustained a torn labrum in training camp that limited him to eight games before was placed on injured reserve.