It would not be surprising if Ben played for another season in 2022 with the Pittsburgh Steelers
There has been much speculation in regards to the quarterback position heading into the 2021 season. Will the Steelers find their Ben Roethlisberger replacement in the 2021 NFL draft? I would have to say probably not this season, but if a second-tier quarterback falls into the 3rd or 4th round like Kellen Mond and Kyle Trask then the Steelers would have no option other than to take one of them because it would be an absolute steal. In all honesty, it would not be surprising if Ben Roethlisberger came back and played with the Pittsburgh Steelers for another season after 2021.
The reason why I say it would not be surprising is that in 2022 the Steelers will still be paying Ben Roethlisberger whether they like it or not. So why not use him even if it's to help develop a younger quarterback going into 2022? Right now Ben gives the Steelers the best chance to win a Super Bowl for the organization and that is the main reason why Art Rooney II and Tomlin decided to bring Roethlisberger back in 2021.
The only way I see Ben Roethlisberger retiring this season is if he gets injured or reinjures his throwing elbow again and there is a lengthy recovery. I am knocking on wood while I type this and I hope Ben Roethlisberger is successful in 2021 because I don't want to see him go out the way he went out in 2020 against the Cleveland Browns.
If Ben does come back in 2022 I think that could be his final season with the Pittsburgh Steelers because going into 2023 they should hopefully (notice I use the word hopefully) a quarterback who can at least take over the reins if Mason Rudolph or Dwayne Haskins does not work out going forward.