The Pats officially ruled out Collins with an undisclosed illness. It will be the linebacker's third missed game with the illness.
NFL Media Insider Ian Rapoport reported earlier this week that Collins got over a virus that knocked him out the previous two games, but his availability in future weeks hinges on gaining back weight and strength.
The Pats listed offensive linemen Marcus Cannon (toe), Tre Jackson (knee), Sebastian Vollmer (concussion) and receiver Keshawn Martin (hamstring) as questionable. Defensive linemen Alan Branch (elbow), Chandler Jones (abdomen), Jabaal Sheard (ankle) and offensive lineman Shaq Mason (knee) are probable. Corner Justin Coleman (hand) is out.
Buffalo defensive tackle Kyle Williams is officially out with a knee injury, his fourth straight missed game.