Pittsburgh Steelers safety Troy Polamalu missed practice for a third consecutive day because of a strained right Achilles' tendon and a sore calf and is likely to miss Sunday's game against the Jets.
Steelers players almost never play after sitting out an entire week of practice.
Polamalu apparently aggravated the injury during his 45-yard interception return touchdown against the Bengals on Sunday. He has been skipping Wednesday and Thursday practices for several weeks, but this is the first time he also missed a Friday practice.
If Polamalu can't play, Ryan Clark would shift to strong safety and Ryan Mundy would play free safety.
Linebacker James Harrison (illness) practiced after being out two days. Tight end Heath Miller (concussion), who sat out Thursday's practice with a headache, also practiced.