This worked for me!! Somehow, it gave each team a 20 man reserve roster, though, which I now have to release all of those players.

I am on a Mac, so ended up just copying and pasting the player IDs (took me 2 hours). Beware: there are 2 Carlos Santans, 3 Carlos Martinez, and a 5 Jose Ramirez, so I had to go into the game and find out which one was the correct one via the "Editor" tab on the player pages.

WOOHOO. There will be fake baseball results of fake...