The only json roster file I can find is the one you can download when creating a new game.

Is it possible to export from a current game and then create the json to import?

The only export I see creates a bunch of CSV files in the output directory. I tried to edit the players.csv and then use the json converter, but it crashed

Thanks for any help

If you export from the player list in college it will create a .json file. Or export the Draft class. Those can be used with the utility in the Mod forum to convert between CSV and JSON. Exporting the entire database just dumps most of the data and attributes to CSV or Access and isn't the same thing.