While the Pittsburgh Steelers were minor players in free agency, and that skewed toward the offensive side of the ball with the additions of Eric Ebron, Stefen Wisniewski, and Derek Watt, arguably the biggest impact on the 2020 season outside of Ben Roethlisberger will be getting a healthy Stephon Tuitt back.
The seventh-year defensive linemen was seemingly on his way to having a career year five games into the 2019 season, finally healthy, until he suffered a season-ending injury early on in game six. While Javon Hargrave and Tyson Alualu filled in and the defense was among the best in the league, Tuitt was arguably the best defender on the team at the time of his injury.