Williams missed practice Friday, a day after being hurt.
The fifth-year player has had limited playing time when healthy this season. Williams has been inactive in three of Buffalo's past seven games. He's not had a catch since an 8-yard reception in a 17-14 win at Detroit on Oct. 5.
On Thursday, Williams said he's ''confused'' by his lack of playing time but remains confident he can be a difference-maker.
Buffalo acquired Williams in a trade with Tampa Bay in April.
He has eight catches for 142 yards and a touchdown this season.
AP NFL website: www.pro32.ap.org and www.twitter.com/AP-NFL