The Buffalo Bills worked out two long snappers on Wednesday as a precaution in the event that Garrison Sanborn - now in his sixth season in that role with the Bills - cannot play against the Minnesota Vikings on Sunday. Sanborn was a limited participant in practice as the Bills began their work week; he's nursing a knee injury.

LS Garrison Sanborn has a knee injury. Limited in practice. Coach Marrone said they worked out a couple of free agents as precaution. #Bills — Chris Brown (@ChrisBrownBills) October 15, 2014

Meanwhile, defensive tackle Marcell Dareus did not participate in Wednesday's practice, either, albeit for a different reason: he was excused for a family situation. Bills head coach Doug Marrone told reporters that Dareus expected back on the practice field on Thursday.

Two key special teams players did not practice, either: wide receiver Marcus Easley, who is expected to miss another 1-3 weeks with a knee injury, and linebacker Ty Powell, who was dinged up last Sunday in New England and is dealing with an ankle injury.

Finally, safety Aaron Williams - who missed Sunday's loss to New England, much to the detriment of the team's ability to match up with Patriots receiving targets - was spotted on the practice field on Wednesday, but with an enormous wrap on his ailing wrist.