Ward was unable to practice this week due to an ankle injury. He was replaced by Emmanuel Sanders. Ward hadn't missed a game since 2007.
Farrior was limited this week with a calf injury. He was replaced by Stevenson Sylvester.
Wide receiver Julian Edelman, linebackers Jermaine Cunningham and Dane Fletcher, safety Josh Barrett, quarterback Ryan Mallett, running back Shane Vereen and offensive lineman Donald Thomas were inactive for the Patriots.
The Steelers won 25-17.
Information from The Associated Press contributed to this report.