This is a list of seasons of Major League Baseball.
| Year | National League Champion | |
|---|---|---|
| 1876 | Chicago White Stockings | |
| 1877 | Boston Red Caps | |
| 1878 | ||
| 1879 | Providence Grays |
| Year | National League Champion | American Association Champion | Union Association Champion | World Series Champion |
|---|---|---|---|---|
| 1880 | Chicago White Stockings | - | - | - |
| 1881 | - | - | - | |
| 1882 | Cincinnati Red Stockings | - | - | |
| 1883 | Boston Beaneaters | Philadelphia Athletics | - | - |
| 1884 | Providence Grays | New York Metropolitans | St. Louis Maroons | Providence Grays (3–0) |
| 1885 | Chicago White Stockings | St. Louis Browns | - | Tie, Chicago White Stockings and St. Louis Browns (3–3–1) |
| 1886 | - | St. Louis Browns (4–2) | ||
| 1887 | Detroit Wolverines | - | Detroit Wolverines (10–5) | |
| 1888 | New York Giants | - | New York Giants (6–4) | |
| 1889 | Brooklyn Bridegrooms | - | New York Giants (6–3) |
| Year | National League Champion | American Association Champion | Players' League Champion | World Series / Temple Cup Champion | |
|---|---|---|---|---|---|
| 1890 | Brooklyn Bridegrooms | Louisville Colonels | Boston Reds | Tie, Louisville Colonels and Brooklyn Bridegrooms (3–3–1) | |
| 1891 | Boston Beaneaters | Boston Reds | - | - | |
| 1892 | - | - | Boston Beaneaters (5–0–1) | ||
| 1893 | - | - | - | ||
| 1894 | Baltimore Orioles | - | - | New York Giants (4–0) | |
| 1895 | - | - | Cleveland Spiders (4–1) | ||
| 1896 | - | - | Baltimore Orioles (4–0) | ||
| 1897 | Boston Beaneaters | - | - | Baltimore Orioles (4–1) | |
| 1898 | - | - | - | ||
| 1899 | Brooklyn Superbas | - | - | - |
| Year | American League Champion | National League Champion | World Series / Chronicle-Telegraph Cup Champion |
|---|---|---|---|
| 1900 | - | Brooklyn Superbas | Brooklyn Superbas (3–1) |
| 1901 | Chicago White Stockings | Pittsburgh Pirates | - |
| 1902 | Philadelphia Athletics | - | |
| 1903 | Boston Americans | Boston Americans (5–3) | |
| 1904 | New York Giants | - | |
| 1905 | Philadelphia Athletics | New York Giants (4–1) | |
| 1906 | Chicago White Sox | Chicago Cubs | Chicago White Sox (4–2) |
| 1907 | Detroit Tigers | Chicago Cubs (4–0) | |
| 1908 | Chicago Cubs (4–1) | ||
| 1909 | Pittsburgh Pirates | Pittsburgh Pirates (4–3) |
| Year | American League Champion | National League Champion | World Series Champion | |
|---|---|---|---|---|
| 1960 | New York Yankees | Pittsburgh Pirates | Pittsburgh Pirates (4–3) | |
| 1961 | Cincinnati Reds | New York Yankees (4–1) | ||
| 1962 | San Francisco Giants | New York Yankees (4–3) | ||
| 1963 | Los Angeles Dodgers | Los Angeles Dodgers (4–0) | ||
| 1964 | St. Louis Cardinals | St. Louis Cardinals (4–3) | ||
| 1965 | Minnesota Twins | Los Angeles Dodgers | Los Angeles Dodgers (4–3) | |
| 1966 | Baltimore Orioles | Baltimore Orioles (4–0) | ||
| 1967 | Boston Red Sox | St. Louis Cardinals | St. Louis Cardinals (4–3) | |
| 1968 | Detroit Tigers | Detroit Tigers (4–3) | ||
| 1969 | Baltimore Orioles | New York Mets | New York Mets (4–1) |
| Year | American League Champion | National League Champion | World Series Champion | |
|---|---|---|---|---|
| 1970 | Baltimore Orioles | Cincinnati Reds | Baltimore Orioles (4–1) | |
| 1971 | Pittsburgh Pirates | Pittsburgh Pirates (4–3) | ||
| 1972 | Oakland Athletics | Cincinnati Reds | Oakland Athletics (4–3) | |
| 1973 | New York Mets | Oakland Athletics (4–3) | ||
| 1974 | Los Angeles Dodgers | Oakland Athletics (4–1) | ||
| 1975 | Boston Red Sox | Cincinnati Reds | Cincinnati Reds (4–3) | |
| 1976 | New York Yankees | Cincinnati Reds (4–0) | ||
| 1977 | Los Angeles Dodgers | New York Yankees (4–2) | ||
| 1978 | New York Yankees (4–2) | |||
| 1979 | Baltimore Orioles | Pittsburgh Pirates | Pittsburgh Pirates (4–3) |
| Year | American League Champion | National League Champion | World Series Champion | |
|---|---|---|---|---|
| 2020 | Tampa Bay Rays | Los Angeles Dodgers | Los Angeles Dodgers (4–2) | |
| 2021 | Houston Astros | Atlanta Braves | Atlanta Braves (4–2) | |
| 2022 | Philadelphia Phillies | Houston Astros (4–2) | ||
| 2023 | Texas Rangers | Arizona Diamondbacks | Texas Rangers (4–1) | |
| 2024 | ||||
| 2025 |