FOXBORO — Patriots starting defensive tackle Milton Williams did not participate in Thursday’s practice.

Williams was listed as limited in Wednesday’s injury report with an ankle ailment. He was downgraded as a non-participant on Thursday, which could be a sign that he won’t play in Sunday’s primetime matchup with the Bills.

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Williams would likely be replaced by defensive tackles Khyiris Tonga and rookie Joshua Farmer if he can’t play on Sunday night. Rookie Eric Gregory also could suit up for the first time this season.

OLB K’Lavon Chaisson (knee), S Jaylinn Hawkins (hamstring), CB Carlton Davis III (illness) and LB Marte Mapu (neck) were listed as limited. Chaisson and Hawkins both returned to practice.

DT Christian Barmore (not injury related/other), LT Will Campbel

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