The 2003 World Series was the championship series of Major League Baseball's (MLB) 2003 season. The 99th edition of the World Series, it was a best-of-seven playoff between the National League (NL) champion Florida Marlins and the American League (AL) champion New York Yankees; the Marlins upset the heavily-favored Yankees, four games to two. The series was played from October 18 to 25, 2003. This was the most recent Series in which the losing team outscored the winning team until 2025; the Yankees lost, despite outscoring the Marlins 21–17 in the Series. This was the Marlins' second World Series championship win, having won their first in 1997. The Marlins would not return to the postseason until 2020. Won the 2003 World Series on October 25, 2003. Wiki link