Major League Baseball (MLB) is a professional baseball organization in North America, consisting of two leagues: the American League and the National League. Founded in 1869, it features 30 teams that compete in a regular season, followed by playoffs to determine the league champions. The season typically runs from April to October. MLB is known for its rich history and traditions, including the iconic World Series, where the champions of both leagues face off. The league has produced legendary players like Babe Ruth and Jackie Robinson, who have significantly influenced the sport and its culture.