Pittsburgh Steelers safety Troy Polamalu did not practice all week because of a left knee injury and will not play Sunday in Kansas City. He might miss the Nov. 29 game at M&T Bank Stadium, too.
Polamalu sat out the Steelers' second through fifth games with a ligament tear, only to injure a different ligament in the same knee.
Tyrone Carter will start in his place.
GIANTS: Linebacker and defensive captain Antonio Pierce is out indefinitely after a magnetic resonance imaging revealed a bulging disk in his neck.
JETS: Former Ravens safety Jim Leonhard is questionable for the team's game at New England after being limited in practice with a broken right thumb.
REDSKINS: Running back Clinton Portis was at the University of Pittsburgh Medical Center to have his concussion evaluated.
Portis was hurt two weeks ago.
NFLPA: The NFL Players Association opposes commissioner Roger Goodell's call for players to tell their teams' medical staffs when they think a teammate shows symptoms of a concussion, saying that is not an adequate solution.
"If every player were a medical doctor that could recognize symptoms of concussions, then that would be a great idea," NFLPA assistant executive director George Atallah said.
SAINTS: The death of the mother of quarterback Drew Brees has been ruled a suicide.
Mina Brees, an attorney from Austin, Texas, died Aug. 7 while visiting Colorado. Grand County coroner Brenda Bock concluded this week that the 59-year-old Brees died of a prescription drug overdose.