American soccer writing, history & data.
| Season | Name | Abbreviation | Champion | Champion (Tier 2) | Champion (Tier 3) |
|---|---|---|---|---|---|
| 1967 | National Professional Soccer League | NPSL | Oakland Clippers | - | - |
| 1967 | United Soccer Association | USA | Los Angeles Wolves | - | - |
| 1968 | North American Soccer League | NASL | Atlanta Chiefs | - | - |
| 1969 | North American Soccer League | NASL | Kansas City Spurs | - | - |
| 1970 | North American Soccer League | NASL | Rochester Lancers | - | - |
| 1971 | North American Soccer League | NASL | Dallas Tornado | - | - |
| 1972 | North American Soccer League | NASL | New York Cosmos | - | - |
| 1973 | North American Soccer League | NASL | Philadelphia Atoms | - | - |
| 1974 | North American Soccer League | NASL | Los Angeles Aztecs | - | - |
| 1975 | North American Soccer League | NASL | Tampa Bay Rowdies | - | - |
| 1976 | North American Soccer League | NASL | Toronto Metros-Croatia | - | - |
| 1977 | North American Soccer League | NASL | New York Cosmos | - | - |
| 1978 | North American Soccer League | NASL | New York Cosmos | - | - |
| 1979 | North American Soccer League | NASL | Vancouver Whitecaps | - | - |
| 1979-1980 | North American Soccer League Indoor League | NASL-Indoor | Tampa Bay Rowdies | - | - |
| 1980 | North American Soccer League | NASL | New York Cosmos | - | - |
| 1980-1981 | North American Soccer League Indoor League | NASL-Indoor | Edmonton Drillers | - | - |
| 1981 | North American Soccer League | NASL | Chicago Sting | - | - |
| 1981-1982 | North American Soccer League Indoor League | NASL-Indoor | San Diego Sockers | - | - |
| 1982 | North American Soccer League | NASL | New York Cosmos | - | - |
| 1983 | North American Soccer League | NASL | Tulsa Roughnecks | - | - |
| 1983-1984 | North American Soccer League Indoor League | NASL-Indoor | San Diego Sockers | - | - |
| 1984 | North American Soccer League | NASL | Chicago Sting | - | - |