American soccer writing, history & data.
1926-1941
| Season | Name | Abbreviation | Champion |
|---|---|---|---|
| 1926 | National Soccer League | NSL | - |
| 1927 | National Soccer League | NSL | - |
| 1928 | National Soccer League | NSL | - |
| 1929 | National Soccer League | NSL | - |
| 1930 | National Soccer League | NSL | - |
| 1931 | National Soccer League | NSL | - |
| 1932 | National Soccer League | NSL | - |
| 1933 | National Soccer League | NSL | - |
| 1934 | National Soccer League | NSL | - |
| 1935 | National Soccer League | NSL | - |
| 1936 | National Soccer League | NSL | - |
| 1937 | National Soccer League | NSL | - |
| 1938 | National Soccer League | NSL | - |
| 1939 | National Soccer League | NSL | - |
| 1940 | National Soccer League | NSL | - |
| 1941 | National Soccer League | NSL | - |
1946-1978
| Season | Name | Abbreviation | Champion |
|---|---|---|---|
| 1947 | National Soccer League | NSL | - |
| 1948 | National Soccer League | NSL | - |
| 1949 | National Soccer League | NSL | - |
| 1950 | National Soccer League | NSL | - |
| 1951 | National Soccer League | NSL | - |
| 1952 | National Soccer League | NSL | - |
| 1953 | National Soccer League | NSL | - |
| 1954 | National Soccer League | NSL | - |
| 1955 | National Soccer League | NSL | - |
| 1956 | National Soccer League | NSL | - |
| 1957 | National Soccer League | NSL | - |
| 1958 | National Soccer League | NSL | - |
| 1959 | National Soccer League | NSL | - |
| 1960 | National Soccer League | NSL | - |
| 1961 | National Soccer League | NSL | - |
| 1962 | National Soccer League | NSL | - |
| 1963 | National Soccer League | NSL | - |
| 1964 | National Soccer League | NSL | - |
| 1965 | National Soccer League | NSL | - |
| 1966 | National Soccer League | NSL | - |
| 1967 | National Soccer League | NSL | - |
| 1970 | National Soccer League | NSL | - |
| 1971 | National Soccer League | NSL | - |
| 1972 | National Soccer League | NSL | - |
| 1973 | National Soccer League | NSL | - |
| 1974 | National Soccer League | NSL | - |
| 1975 | National Soccer League | NSL | - |
| 1976 | National Soccer League | NSL | - |
| 1977 | National Soccer League | NSL | - |
| 1978 | National Soccer League | NSL | - |
1975-1978
1979-1992
1993-1997