Cornerback Bryant McFadden will miss at least five games with a broken forearm, injured in the fourth quarter Sunday against the Bengals.
McFadden had surgery on his arm yesterday morning.
McFadden arrived at the Steelers' training site yesterday with his right arm in a sling and what appeared to be a soft cast. He was injured on the same play in which safety Troy Polamalu left with a head injury.
Doctors likely will want to evaluate Polamalu as the week goes on. Coach Mike Tomlin said Sunday night that Polamalu was "dinged" after his helmet flew off his head when he hit Cincinnati Bengals running back Cedric Benson.
Polamalu has had at least six concussions playing high school, college and pro football, most recently Nov. 12, 2006 against New Orleans.
Deshea Townsend likely will return to start at left cornerback, where he began the season, and William Gay would move up as the nickel back because of McFadden's injury.
When Polamalu left the game in Cincinnati, veteran Tyrone Carter replaced him.