Wolff has a long history of sports franchise ownership. In the past, he has been a co-owner of the St. Louis Blues of the National Hockey League and the Golden State Warriors of the National Basketball Association. On April 1, 2005, Wolff and an ownership group led by The Gap heir, John J. Fisher, purchased the Oakland Athletics baseball team for $180 million from Stephen Schott and Ken Hofmann. Wolff's investment gave him a 10% ownership interest. In 2006, the A's ownership group purchased an option to revive the San Jose Earthquakes franchise of Major League Soccer. At the 2007 MLS All Star Game, it was announced that Wolff had exercised the option, and the Earthquakes began play during the 2008 MLS season.