12:33 PM - Derrick Harmon (Pit) (knee) has been ruled out of the Steelers' Week 14 matchup with the Ravens, Missi Matthews of the Steelers' official site reports.

12:19 PM - Derrick Harmon (Pit) head coach Mike Tomlin said that Harmon has been ruled out for Sunday's game against the Bills, due to a knee injury, Gerry Dulac of the Pittsburgh Post-Gazette reports.

11:42 AM - Derrick Harmon (Pit) (knee) is active for Sunday's game against the Patriots.

3:31 PM - Derrick Harmon (Pit) (knee) is listed as questionable ahead of Sunday's matchup against the Patriots, Teresa Varley of the Steelers' official site reports.

5:46 PM - Derrick Harmon (Pit) coach Mike Tomlin announced Tuesday that Harmon (knee) has been ruled out for the Steelers' Week 2 contest against the Seahawks on Sunday, Alan Saunders of SteelersNow.com reports.

2:33 PM - Derrick Harmon (Pit) Mike Tomlin said Tuesday that Harmon (knee) will not play in Sunday's Week 1 game against the Jets, Mike DeFabo of The Athletic reports.