Sports management is a reasonable option, if that's what interests you. Teams also need management familiar with contract law, public relations, and advertising. Several executives in MLB have taken this route to their current positions, and it's certainly the tactic I would recommend. If you can dance, you could try the MC Hammer route with some current owners, though I wouldn't chance it with Peter Angelos. Try not to imitate Hammer's moves too closely.
Nobody likes a poseur.
Best of luck.