BOSTON (CBS) — When David Andrews showed up to practice on Thursday sporting a big wrap or a cast on his right thumb, it didn’t look good. Now we know the details.

Fox Sports’ Jay Glazer reported Friday that the Patriots’ center suffered a broken thumb last week, an injury which required surgery.

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Glazer said the Patriots might explore having Andrews snap with his left hand this week, but most likely, the offensive captain will not be in action against the Raiders and perhaps even longer.

NFL Network’s Mike Giardi added to the report, likening Andrews’ injury to a broken knuckle.

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Andrews was ruled out for Sunday’s game by Friday afternoon.

Andrews, 28, missed all of last season due to blood clots found in his lungs. He returned this year and has been on the field for 100 percent of the team’s offensive snaps.

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With Andrews out, the Patriots will need to shuffle their line and/or elevate a player from the practice squad in order to try to maintain the league’s ninth-ranked rushing attack and eighth-ranked passing offense.