Robert Spillane suffered a shin injury during pregame warmups. That’s why he is inactive.
— Ray Fittipaldo (@rayfitt1) September 12, 2021
It seems the plan was for Pittsburgh Steelers linebacker Robert Spillane to play this week against the Buffalo Bills with rookie linebacker Buddy Johnson on the inactive list. However, Spillane suffered a shin injury in pregame warmups, pushing Johnson to the gameday roster and Spillane will sit.