The Steelers wrapped up practice preparations on Friday for the week 15 Sunday game versus the Baltimore Ravens. DE Brett Keisel (knee) was not able to practice again on Friday and is no listed as out this week along with T Marvel Smith (back). RB Carey Davis (calf) was able to practice fully on Friday and is listed as questionable on the injury report. LB James Harrison (knee) and S Troy Polamalu (calf) both also practiced fully on Friday and are listed as probable on the injury report and barring any set backs both should be able to play. RB Willie Parker, DE Aaron Smith, CB Deshea Townsend and WR Hines Ward all practiced fully for the second straight day after given off days on Wednesday. None of the four are listed on the team\'s official injury report.