Linebacker Ryan Kerrigan injured his groin during the Redskins' first defensive series and was ruled out for the rest of Friday night's game against the Bills.
Following the first series with the starting defense Friday night against the Buffalo, Redskins outside linebacker Ryan Kerrigan exited the game due to a groin injury.
The Redskins allowed a first down to Buffalo on a pair of running plays before forcing the Bills to punt on the opening series of the game. Following the punt, with Washington in possession, it was announced that Kerrigan would not return to the game due to the injury.
Kerrigan is far and away the Redskins sack leader since being drafted by the team in 2011 out of Purdue, totaling 47.5 career sacks. He has not missed a regular season game in his five-year career.