The Sports Directory
The alphabetized directory includes mailing addresses and phone/FAX numbers for major sports organizations, along with their website and email addresses.
The list includes national and international governing bodies, sanctioning organizations, leagues and conferences, teams, and quasi-official bodies such as halls of fame.
If you're interested in broader coverage than that, visit the sports category of the Open Directory Project, which includes links to thousands of sports sites, arranged alphabetically by sport.