Marketing in Pro Sports

In the U.S. professional sports are sought out to be Americas past time and a major important piece of our cultural experience. with sports fans in every single state its only right that companies market themselves through sports teams and organizations. If you have ever been to Fenway Park or any sports stadium in that matter its obvious that these places are the mecca of advertisements. with so much exposure of major media and television, its only logical to try and make a deal with a major sports team. Jay-Z for example, is a hip hop star who uses all of the New York Sports teams to promote himself and his music.

What are other ways in which companies can market themselves through professional sports?