The Red Sox By bostonboy232 Oct 1, 1901 Red Sox Founded The Boston Red Sox were founded in 1901 in the American League. Oct 2, 1903 Red Sox win their first World Series. The Boston American beat the Pittsburgh Pirates in the 1903 World Series. Jan 1, 1912 The Red Sox win their second World Series. Jan 1, 1915 The Red Sox win their third World Series. Jan 1, 1916 The Red Sox win their fourth World Series. Jan 1, 1918 Red Sox win their fifth World Series. Sep 1, 1918 Red Sox go into a championless drought. Jan 1, 2004 Red Sox win their sixth World Series. Oct 21, 2004 Red Sox make history against the Yankees. Oct 27, 2004 The Red Sox end their championless drought. Jan 1, 2007 Red Sox win their seventh World Series.