In the main menu, click on Football 2013/Overview. It will show you a lits of all the leagues you are in with your team name for each league. Just to the upper right of this list is a link that says "Edit Teams." Click on that link. That will take you to a list of all your teams. IF your league is not full and IF you have not yet had your draft, you can click on "Delete" just to the right of the team in the league you want to get out of, and you're outta there.