Part of Major League Baseball Blue, Inc., Major League Baseball Properties, Inc. (doing business as Major League Baseball) is an American company located in New York, NY. The firm operates a professional baseball league.\nThe company says this about itself: Major League Baseball (MLB) is the most historic professional sports league in the United States and consists of 30 member clubs in the U.S. and Canada, representing the highest level of professional baseball. It is the best-attended sport in North America, and since 2004, MLB has enjoyed its best-attended seasons in the history of the game. Led by Commissioner Robert D. Manfred, Jr., MLB currently features record levels of labor peace, competitive balance and industry revenues, as well as the most comprehensive drug-testing program in American professional sports.