Sean Spence
Ryan Shazier was the MACK linebacker for the majority of the season and went down with a tragic injury. Sean Spence was not on a roster when Shazier got hurt but he was signed soon afterward and ended up winning the job after splitting time with Arthur Moats and LJ Fort.
However, Spence was rusty a lot of the season and showed why he didn’t have a role on a team before Shazier’s injury. The Steelers will have this offseason to upgrade at the MACK linebacker spot and it would be nice to get a legitimate starter in free agency or a high pick pick in the draft.