FOXBORO, Mass. -- We're on Day 13 of Jamie Collins watch, and nothing have changed.

The New England Patriots starting linebacker remained out of practice Friday with a mysterious illness. Collins first was placed on the injury report Saturday Nov. 7.

Cornerback Justin Coleman (hand) and wide receiver Julian Edelman (foot) also didn't participate in Friday's walk-through.

Defensive end Chandler Jones (abdomen) and defensive tackle Alan Branch (elbow), both of whom first popped up on the injury report Thursday, were present for the practice session.

The Patriots will hold a practice Saturday and a walk-through Sunday in anticipation for their Week 11 Monday night matchup with the Buffalo Bills.

Thumbnail photo via Mark L. Baer/USA TODAY Sports Images