Aaron Rodgers (Getty Images)The Pittsburgh Steelers are heading into 2026 with Aaron Rodgers at quarterback, Mike McCarthy calling the shots and genuine Super Bowl expectations sitting on their shoulders. Rodgers is back for one final year, the offensive line is improved, and the AFC North title from last season gives them real momentum. But Pittsburgh isn't just hoping Rodgers stays healthy and plays well. They are quietly building one of the more unusual depth charts at quarterback the league has seen, and it tells you a lot about how they see this season playing out.Will the Steelers actually keep four quarterbacks on their 53-man roster?That appears to be where things are heading. ESPN's Todd Archer released a roster projection Monday that has Pittsburgh keeping all four of their quarterbacks: Aaron Rodgers, Mason Rudolph, Will Howard and Drew Allar. All four. On one roster.Archer acknowledges it breaks convention. McCarthy has never carried four quarterbacks on his opening 53-man roster. But Archer argues this season is different, writing that the "toughest decision facing the Steelers comes behind Aaron Rodgers and the deliberation between keeping two or three backup quarterbacks."The reasoning makes sense when you look at it clearly. Rudolph is the obvious emergency option, a veteran who knows the system. Howard and Allar are young and raw, but their preseason work has been encouraging. Archer notes that the two young quarterbacks are "progressing well under coach Mike McCarthy and could handle filling in for Rodgers in case of emergency." The gap between Rudolph and that younger pair is significant enough that cutting any of them would be a gamble Pittsburgh doesn't need to take right now.So yes, four quarterbacks. It is unusual. It is also, given the circumstances, probably the right call.What happens to the Steelers after Aaron Rodgers' final season?That question is already being asked, and it matters more than most fans want to admit. ESPN's Dan Graziano addressed it directly in a quarterback outlook piece Thursday, laying out what this season really means for Pittsburgh beyond just wins and losses.McCarthy gets a full year to evaluate Howard and Allar up close. If Rodgers performs well and Pittsburgh goes deep, the transition happens on Pittsburgh's terms. Graziano sees that as the most likely outcome, writing that "Rodgers rides off into the sunset and the Steelers are left to evaluate Allar, Howard and potential 2027 draft picks as their long-term solution."But if Aaron Rodgers struggles, the decision gets made for them. Allar's strong showing in the first preseason game already has people paying attention. Pittsburgh would not hesitate to turn to him if the situation demanded it.Either way, this season ends with the Steelers at a crossroads. Four quarterbacks on the roster isn't just depth planning. It's the organization keeping every option open before a decision that will define the next several years.