Buffalo Bills
Dec 19
Duke Williams
Status: Probable
Position: Strong Safety

Williams (concussion) is listed as probable for Sunday's game in Oakland after practicing on a limited basis Friday.
Stephon Gilmore
Status: Probable
Position: Cornerback

Gilmore (shoulder) is listed as probable for Sunday's game in Oakland after practicing on a limited basis Friday.
Da'Norris Searcy
Status: Probable
Position: Strong Safety

Searcy (hamstring) is listed as probable for Sunday's game in Oakland after practicing on a limited basis Friday.
Chris Gragg
Status: Questionable
Position: Tight End

Greg (knee) is listed as questionable for Sunday's game in Oakland after practicing on a limited basis Friday.
C.J. Spiller
Status: Probable
Position: Running Back

The Bills have officially added Spiller (collarbone) to their 53-man roster in advance of Sunday's game against the Raiders, the team's official site reports.
Dan Carpenter
Status: Probable
Position: Place kicker

Carpenter (groin) is listed as probable for Sunday's game in Oakland.
Marcus Thigpen
Status: Probable
Position: Running Back

Thigpen (foot) is listed as probable for Sunday's game in Oakland.
C.J. Spiller
Status: Injury Reserve
Position: Running Back

The Bills have submitted paperwork to the NFL to add Spiller (collarbone) back to 53-man roster, according to ESPN's Mike Rodak.
Dec 18
Marcus Thigpen
Status: Questionable
Position: Running Back

Thigpen suffered a foot injury in practice this week and was listed as a limited participant for Thursday's practice. Coach Doug Marrone thinks he'll be OK to play Sunday in Oakland, The Buffalo News reports.
Chris Gragg
Status: Questionable
Position: Tight End

Gragg (knee) practiced in a limited fashion Thursday, the Bills' official site reports.
Scott Chandler
Status: Probable
Position: Tight End

Chandler (illness) returned to practice Thursday, ESPN's Mike Rodak reports.
Dec 17
Stephon Gilmore
Status: Questionable
Position: Cornerback

Gilmore was limited during Wednesday's practice due to a shoulder issue.
Scott Chandler
Status: Questionable
Position: Tight End

Chandler (illness) missed practice Wednesday, the Bills' official site reports.
C.J. Spiller
Status: Injury Reserve
Position: Running Back

Spiller (collarbone) practiced in a limited fashion Wednesday, the Bills' official site reports.
Dec 15
C.J. Spiller
Status: Injury Reserve
Position: Running Back

Spiller, currently on IR/designated to return after suffering a collarbone injury during Week 7, will be added back to the active roster this week. The running back is eligible to play this week against the Raiders, though Doug Marrone will first see how Spiller practices this week.