Patriots running back Jonas Gray, who was a limited participant Thursday with an ankle injury, was not spotted at practice Friday, leading up to New England's Week 17 showdown against the Bills, ESPN reports.
Gray carried the ball six times for 5 yards and a score in Week 16 against the Jets. He has 412 rushing yards this season. If he's unable to play, the team will likely turn to LeGarrette Blount and Shane Vereen to shoulder the rushing workload.
The Patriots opened as an 8 1/2-point favorite at home on Sunday. The line has dropped to 4 1/2 points, per Vegas Insider.