http://iscoresports.com/

I scored a game and it wasn't until a day later that I realized that I had selected the wrong team. I selected our last year's team instead of this year's. Now all the stats for this year are wrong, they don't have this one game. How can I go back now and change the team to the correct one?

You can not change the team that was used to score a game. You can merge last year's team and this year's team into one so the games are together, and then use Leagues to categorize the games by season. But if you score a game with Team X, all of the players during the game would be the ones for Team X as well, and that can not be changed.

Here is a link that describes how to use a single team for multiple seasons:

http://iscoresports.com/baseball/kb/faq ... season.php

If you want to do it that way, you would do it after merging the teams.