1940s
| Year | American League Champion | National League Champion | World Series Champion |
|---|---|---|---|
| 1940 | Detroit Tigers | Cincinnati Reds | Cincinnati Reds (4-3) |
| 1941 | New York Yankees | Brooklyn Dodgers | New York Yankees (4-1) |
| 1942 | New York Yankees | St. Louis Cardinals | St. Louis Cardinals (4-1) |
| 1943 | New York Yankees | St. Louis Cardinals | New York Yankees (4-1) |
| 1944 | St. Louis Browns | St. Louis Cardinals | St. Louis Cardinals (4-2) |
| 1945 | Detroit Tigers | Chicago Cubs | Detroit Tigers (4-3) |
| 1946 | Boston Red Sox | St. Louis Cardinals | St. Louis Cardinals (4-3) |
| 1947 | New York Yankees | Brooklyn Dodgers | New York Yankees (4-3) |
| 1948 | Cleveland Indians | Boston Braves | Cleveland Indians (4-2) |
| 1949 | New York Yankees | Brooklyn Dodgers | New York Yankees (4-1) |
Read more about this topic: List Of Major League Baseball Seasons