The St. Louis Browns was a Major League Baseball team that originated in Milwaukee, Wisconsin, as the Milwaukee Brewers. A charter member of the American League (AL), the Brewers moved to St. Louis, Missouri, after the 1901 season, where they played for 52 years as the St. Louis Browns.

Major League Baseball (MLB) is a professional baseball league and the highest level of organized baseball in the United States and Canada. One of the big four major leagues, MLB comprises 30 teams, divided equally between the National League (NL) and the American League (AL), with 29 in the United States and 1 in Canada. Formed in 1876 and 1901, respectively, the NL and AL cemented their cooperation with the National Agreement in 1903, making MLB the oldest major professional sports league in the world. They remained legally separate entities until 2000, when they merged into a single organization led by the Commissioner of Baseball. MLB is headquartered in Midtown Manhattan.