Major League Baseball has existed since 1903 and is a professional baseball league that consists of teams in Canada and the US. This entity runs the American League. They have an organizational structure that allows them to run and organize both leagues.
The leagues rules and structure are based on a constitution that has existed ever since 1876. In 1876, it was called the NL constitution then they called the Major League Baseball Constitution. The last revision of this constitution was in 2005. The constitution says that the commissioner hires and maintains the umpires and negotiates with the players, the marketers and the TV contracts.
Though the United States does not usually allow monopolies, Major League Baseball is allowed to be a monopoly. There are no competing professional baseball leagues in the United States. It is allowed to be a monopoly because the US Supreme Court ruled in 1922 that MLB is not interstate commerce.
MLB has a production/multimedia and it called MLB Advanced Media. It maintains the http://MLB.com website and all 30 of the individuals teams websites. The charter says this wing is independent of the league as far as editorial...