BOSTON (CBS) — Things are getting awfully dicey in the Patriots’ defensive backfield.

According to the Boston Herald’s Jeff Howe, cornerback Alfonzo Dennard is not expected to play Sunday night against the Broncos, and he could miss even more time.

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Dennard is dealing with a knee injury, which didn’t land him on the injury report until midweek in the Patriots’ preparation for Carolina. He missed Monday night’s game and now stands to miss more time.

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The Patriots will host the Broncos on Sunday night at Gillette Stadium, where Peyton Manning will lead the league’s No. 1 passing offense. The Patriots are already thin in the defensive backfield, as Aqib Talib left Monday’s game with a recurrence of the hip injury that kept him sidelined for nearly a month. Cornerback Kyle Arrington played despite being listed as questionable with a groin injury, while safety Steve Gregory did not play due to a broken thumb.

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After Denver, the Patriots face Houston (eighth-ranked offense), Cleveland (25th), Miami (31st), Baltimore (30th) and Buffalo (17th).