1903 World Series

The 1903 World Series was the first-ever championship series between Major League Baseball’s two leagues, the American League and the National League. It featured the Boston Americans (later Red Sox) against the Pittsburgh Pirates. The series consisted of nine games, and Boston emerged victorious, winning five games to three. This event marked the beginning of the modern World Series, establishing a postseason format that continues today. It showcased the growing popularity of baseball as America's favorite pastime and set the foundation for future championship series.