Doug Marrone has said that the Buffalo Bills will test CJ Spiller's ankle early this week.
The running back has been struggling with an ankle sprain for the last three weeks, and was forced to sit out the team's game against the New Orleans Saints at the weekend.
The head coach told reporters: "It's a high ankle [sprain], which is normally a little bit worse than the other ones. With CJ we're going to test it out Monday or Tuesday."
Spiller has 362 rushing yards and one touchdown so far this season.