http://iscoresports.com/

Is there a way to go back and add previous seasons (not game by game, but final individual stats) in order to help compile viewable career statistics?

I have final stats for the last 20 years and I know I can use the filter for each year, but how can I input seasons already played without doing it game by game?

You can create a dummy game for each season. You do not need to actually score it. Just start it and then press misc - end game. Then you can override the stats for that game to show the stats for the entire season.

teammom on the spot..

alos, if you have data down to the individual level, you need to make they play in the game. for batting, you need are in the line up for batting. if you have individual pitching stats, need to sub in each pitcher and give them a pitch so they show up in the pitching group.