Harris (ankle) was limited at practice Thursday, Mike Reiss of ESPN.com reports.
Harris was one of 20 players listed as questionable by the Patriots on Thursday, but of that group he's one whose Week 16 status is indeed cloudy, given that the running back was inactive this past Sunday against the Dolphins. If Harris isn't cleared for Monday night's game against the Bills, Sony Michel would be in line to continue to head New England's backfield, with James White on hand for change-of-pace duties and J.J. Taylor (quadriceps) in reserve.