Woodley was a limited participant in practice on Wednesday and Thursday, but did not practice on Friday. The Michigan product has 36 tackles, nine sacks and one interception in eight games this season.
Fellow linebacker James Farrior (calf), who missed last week's game against the Patriots, is listed as questionable for Sunday. He has 45 tackles and two sacks in seven contests this year.
In other linebacker news, James Harrison is ready to make his return to the lineup after fracturing his right orbital bone in a Week 4 loss to the Texans.
Harrison, who hasn't played since the injury, was a full participant in Friday's practice and is probable for Sunday.
Wide receiver Hines Ward (ankle) is questionable for 6-2 Pittsburgh, which is set to take on 5-2 Baltimore in a key NFC North battle. The Ravens beat the Steelers, 35-7, on September 11.