Pittsburgh Steelers LB James Harrison (shoulder, triceps) sat out practice Thursday, Jan. 22. LB Vince Williams (shoulder) was a limited participant, while RB Fitzgerald Toussaint (concussion), QB Zach Mettenberger (illness), WR Darrius Heyward-Bey (illness), DE Ricardo Mathews (ankle), C B.J. Finney (illness), S Sean Davis (shoulder) and LB Anthony Chickillo (ankle) all practiced in full.