Allen remains in protocol, does positional work at practice

Buffalo Bills quarterback Josh Allen remained in concussion protocol on Wednesday, but was on the practice field doing individual position drills. Allen was hit in the head by New England Patriots defensive back Jonathan Jones on Sunday in the fourth quarter. He left the game and didn't return. Head coach Sean McDermott didn't provide any further updates when he met with the media for his weekly Wednesday press conference.

Here's a look at Josh Allen during #Bills practice as the rain came down in Orchard Park.Sean McDermott said he's doing individual work today, a sign he's in Stage 4 of 5 in concussion protocol.Should note, he took 1st reps during drill work. pic.twitter.com/hndlZEKjnE

Even in concussion protocol, Josh Allen is not going to be 2nd. #Bills pic.twitter.com/1qr2cY9KPt

McDermott also announced that safety Dean Marlowe and fullback Patrick DiMarco were also in the league's concussion protocol and that running back Devin Singletary and cornerback Taron Johnson were both limited at practice as they continue to recover from hamstring injuries.

Wednesday injury report: pic.twitter.com/dH4jR75Otz

The Bills will travel to Tennessee to take on the Titans this Sunday at Nissan Stadium. If Allen can't play, Matt Barkley will assume the starting quarterback duties.

"We're always going to want to put players in positions that they're comfortable with, that puts them in positions of strength," McDermott said when asked about the differences between Allen and Barkley and how that impacts preparation. "We're extremely confident in Matt Barkley, so we'll just see how that moves forward as we go through the week."