The Green Bay Packers will kick off their preseason against Mike McCarthy’s Pittsburgh Steelers on Thursday night. The three exhibition games will weigh heavily in general manager Brian Gutekunst’s final decisions on players on the roster bubble. Analysis: These players will form the core of the roster that will compete for championships this season. After a promising finish to his rookie season, Brinson moved up because he’s taken a huge Year 2 jump. What changed: Dabney shot up from our bottom tier into this tier and Stackhouse is up one tier.