The 1887 World Series was won by the Detroit Wolverines of the National League, over the St. Louis Browns of the American Association, 10 games to 5. It was played between October 10 and 26, and played in numerous neutral cities, as well as in Detroit and St. Louis. Detroit clinched the series in game 11. This Series was part of the pre-modern World Series, an annual competition between the champion of the National League and the champion of the American Association.