EAST RUTHERFORD, N.J. (AP) - Buffalo Bills running back Fred Jackson is out of Sunday's game against the New York Jets with an injured right knee.

Jackson, who went on injured reserve last November with a broken right leg, went down with 11:07 left in the first half Sunday when he ran for 7 yards and was hit hard by LaRon Landry. Jackson went down immediately and stayed down for a few moments while he was checked by trainers before walking on his own to the sideline.

Trainers worked on Jackson's right knee for several minutes on the bench. He walked around on the sideline for a while before finally heading to the locker room, a towel draped over his head, with two trainers accompanying him.