The World Series is the championship series of Major League Baseball (MLB), played between the American League (AL) champion team and the National League (NL) champion team. The World Series is one of the most iconic and highly anticipated sporting events in the United States. It is a best-of-seven game series, with the team that wins four games first being crowned the champion. The World Series has a rich history, dating back to 1903, and has been played annually since then. The series has been dominated by a few teams, including the New York Yankees, who have won 27 World Series titles.