The spreadsheet you actually run the league on is enough. One row per player, a parent's email on it, and OrgFrame works out the rest.
A few minutes in the tool you're leaving.
You see all of it before anything is saved, and OrgFrame asks about anything it isn't sure of.

What the League plan does that a spreadsheet leaves to you.
No export carries these, from any tool. Here's what to do instead.
The export takes minutes. Most of the time goes into the review: checking names and answering the few questions your files leave open. The import itself runs in the background, and Undo removes exactly what it added.
No demo or credit card required.