Bills linebacker Shawne Merriman has been placed on season-ending injured reserve because of a right Achilles' tendon injury. It's the same injury that forced Buffalo to place him on IR last November after they signed him as a free agent following his release from the Chargers. "Shawne has worked extremely hard, but unfortunately his Achilles flared back up and it doesn't appear that he will be able to return to the field anytime soon," Bills general manager Buddy Nix said in a statement. "We felt it was in the best interest of our team and for Shawne to put him on IR."