The 1946 Boston Red Sox season was the 46th season in the franchise's Major League Baseball history. The Red Sox finished first in the American League (AL) with a record of 104 wins and 50 losses. This was the team's sixth AL championship, and their first since 1918. In the 1946 World Series, the Red Sox lost to the National League (NL) champion St. Louis Cardinals, whose winning run in the seventh game was scored on Enos Slaughter's famous "Mad Dash".