Linebacker Kirk Morrison was released by the Buffalo Bills, who needed to create a roster spot with center Eric Wood out indefinitely and offensive tackle Chris Hairston also banged up.
Wood suffered a torn MCL and could be done for the season, while Hairston's status for Sunday's game against St. Louis is in doubt.
"We'll probably have to make some kind of roster move to give us a little bit more depth on the offensive line," said Bills head coach Chan Gailey.
David Snow is expected to start at guard or center, and Sam Young would likely replace Hairston on the right side.
An eighth-year veteran, Morrison signed a one-year deal on Aug. 26, 2011, and went on to play in 14 games, primarily as a reserve linebacker. He re-signed in March and played in each of the four preseason games, but did not play a down through the Bills' first 12 games of the regular season.
He had been listed as the primary backup to middle linebacker Kelvin Sheppard.
Morrison, 30, played his first five NFL seasons with the Oakland Raiders before joining the Jacksonville Jaguars in 2010.