According to Jason LaCanfora of CBSSports.com, he will have an MRI on the knee on Monday, when the team will find out how long he will be out.
The injury is an unfortunate one, as a knee surgery prematurely ended his 2011 season. In the meantime, C.J. Spiller will get the bulk of the carries for the Bills.
For more on the Jets, head over to Gang Green Nation, and stick to SB Nation New York for all the latest updates on the team throughout the course of the season. For more news and notes from around the NFL, head over to the SB Nation NFL Hub Page.