Bills defensive end Chris Kelsay plans to retire after 10 seasons in Buffalo.
Kelsay informed general manager Buddy Nix of his decision Wednesday, the team announced.
The decision came as a slight surprise. Earlier this month, Kelsay indicated he was preparing to play next season after Bills doctors had cleared him for practice. Kelsay finished last season on injured reserve after tearing a ligament in his neck.
Kelsay's status in Buffalo was uncertain entering this season under new coach Doug Marrone. Buffalo's defense is in transition under new coordinator Mike Pettine.
Selected in the second round of the 2003 draft out of Nebraska, Kelsay finished with 32½ career sacks to rank ninth on the team list. He also proved durable in appearing in 147 games, including 120 starts.