1880s
| Year | National League Champion | American Association Champion | Union Association | World Series Champion |
|---|---|---|---|---|
| 1880 | Chicago White Stockings | |||
| 1881 | Chicago White Stockings | |||
| 1882 | Chicago White Stockings | Cincinnati Red Stockings | ||
| 1883 | Boston Beaneaters | Philadelphia Athletics | ||
| 1884 | Providence Grays | New York Metropolitans | St. Louis Maroons | |
| 1885 | Chicago White Stockings | St. Louis Browns | ||
| 1886 | Chicago White Stockings | St. Louis Browns | St. Louis Browns (4-2) | |
| 1887 | Detroit Wolverines | St. Louis Browns | Detroit Wolverines (10-5) | |
| 1888 | New York Giants | St. Louis Browns | New York Giants (6-4) | |
| 1889 | New York Giants | Brooklyn Bridegrooms | New York Giants (6-3) |
Read more about this topic: List Of Major League Baseball Seasons