Just two days into training camp, the Buffalo Bills have their first injury of significance.

All-Pro defensive lineman Marcell Dareus tweaked his hamstring Friday and could miss time during camp, head coach Sean McDermott said Saturday morning.

“I’m staying positive. He’s done a great job of being in shape at this point in camp,” McDermott said.

Still seven weeks away from their regular-season opener, the Bills will err on the side of caution and ensure their nose tackle will be right for when the game’s matter.

Dareus played in eight games last season, his fewest game total as a pro, and recorded 39 tackles and 3.5 sacks.

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