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FOXBORO, Mass. -- It appears Jamie Collins hasn't made his return to the New England Patriots' facility yet.

The starting linebacker didn't practice Thursday, and his chair still was propped up against his locker in the morning. Collins has been dealing with a mysterious illness since being added to the injury report Nov. 7. He reportedly was "over" the illness as of Wednesday, so it's odd he still hasn't returned.

Cornerback Justin Coleman (hand) and wide receiver Julian Edelman (foot) also were absent for practice.

The Patriots play the Buffalo Bills on Monday night. The Patriots also will practice Friday and Saturday in preparation for the Week 11 matchup.

Thumbnail photo via Kyle Terada/USA TODAY Sports Images