Four Washington Redskins defensive players — three of them starters — are questionable for the team’s game against the Buffalo Bills in Toronto Sunday.

Carolina Panthers wide receiver Steve Smith (89) carries the ball past Washington Redskins inside linebacker London Fletcher (59) during the third quarter of the Panthers' win Sunday. (Photo by Ricky Carioti/The Washington Post)

Listed as probable for Sunday’s game are right tackle Jammal Brown (hip), safety Reed Doughty (chest), backup quarterback Rex Grossman (pneumonia), receiver Donte Stallworth (hamstring), cornerback Byron Westbrook (hamstring) and cornerback Josh Wilson (hamstring).

Ruled out for the Redskins are tackle Trent Williams (ankle) and fullback Mike Sellers (back).

Ruled out for the Bills are tackles Demetrius Bell (shoulder) and Chris Hairston (ankle), receiver Donald Jones (ankle), linebacker Shawne Merriman (Achilles’ tendon), cornerback Aaron Williams (chest) and defensive tackle Kyle Wililams (foot). No Buffalo player is listed as questionable. The only other player on the Bills’ injury report is linebacker Chris Kelsay, who has a calf injury.