When you click on a player in progressive leagues, you get their prior history, but without the season year or years, only the league number for that season.
I may be the only one that has not memorized every single season number for every league I have played in, but I bet not.
I know that the seasons are listed in order, so it is possible to do the calculation, but there is also the problem that players have some missing seasons, so you can't really be certain. It takes something away from the suspension of disbelief that makes progressives fun.
could some function be included in an update that lists the league seasons in calendar years when we check a player's league history?