As of present, there are only nine stadiums out of 30 MLB venues that are not sponsored by a corporation or product: Dodger Stadium (Los Angeles Dodgers), Yankee Stadium (New York Yankees), Fenway Park (Boston Red Sox), Wrigley Field (Chicago Cubs), Nationals Park (Washington Nationals), and Marlins Park (Miami Marlins). Of these nine stadiums, three are owned by Major League Baseball teams: Dodger Stadium, Yankee Stadium, and Fenway Park. The other six are owned by different companies which either lease the stadium site from their baseball team owners or sell food, beverages, or merchandise inside the stadium. However, since 2004, when Bush Stadium in Washington DC was renamed Nationals Park, every major league venue except for Oakland Coliseum and Hubert H. Humphrey Metrodome has had a corporate sponsor. Stadiums often seek sponsors because they can generate revenue while their teams are not playing games. For example, a stadium may charge a fee to display its brand on equipment used by the visiting team or at home run balls. It may also be able to influence which players or coaches are hired by the team after it leaves the stadium premises. The most lucrative sports franchise in the world is the NFL's New England Patriots, who have earned $115 million in corporate sponsorships since 2001. The next highest-earning team is the NBA's Chicago Bulls with $65 million in sponsorships since 1997.