The 1903 World Series was the first modern World Series to be played in Major League Baseball. It matched the American League (AL) champion Boston against the National League (NL) champion Pittsburgh[note 1] in a best-of-nine series, with Boston prevailing five games to three, winning the last four. The first three games were played in Boston, the next four in Allegheny (home of the Pirates), and the eighth (last) game in Boston.