Looking for a sports league management plug-in

I am lookin for a sports league management plug-in similar to League Manager, but, I'd like to be able to have folks register and pay for their team for a league (baseball, soccer, volleyball).

I am currently implementing membership and appointments plug-ins for a community center to manage their gym memberships, room rentals and class registrations. Adding league management to their WP site would be the ideal next step.

Any suggestions or direction would be greatly appreciated. Thanks!