http://iscoresports.com/

I'm trying to get set up for a new season, and it's better if I delete all the previous players and teams and start over. There's no way to delete them all at once, either through the app or online. I'm having to delete them one at a time. Tedious as heck. Is there a way for me to do this quicker?

Why would you want to delete the players? It is nice to have the history of the players in case you face them again.

You are correct that there is no mass delete.

You can uninstall and reinstall if you want to completely start over.

Better to use leagues to manage the data. There is generally no need to ever delete anything in iscore.