American soccer writing, history & data.
| Season | Name | Abbreviation | Champion | Champion (Tier 2) | Champion (Tier 3) |
|---|---|---|---|---|---|
| 1903 | California Association Football League | CAFL | American-British Rifles A.F.C. | - | - |
| 1903-1904 | California Association Football League | CAFL | Scottish Thistle A.F.C. | - | - |
| 1904-1905 | California Association Football League | CAFL | Independent A.F.C. | - | - |
| 1905-1906 | California Association Football League | CAFL | Oakland Hornets A.F.C. | - | - |
| 1906-1907 | California Association Football League | CAFL | Oakland Hornets A.F.C. | - | - |
| 1907-1908 | California Association Football League | CAFL | Albion Rovers A.F.C. | - | - |
| 1908-1909 | California Association Football League | CAFL | Vampire A.F.C. | - | - |
| 1909-1910 | California Association Football League | CAFL | Thistle A.F.C. | - | - |
| 1910-1911 | California Association Football League | CAFL | Vampire A.F.C. | - | - |
| 1911-1912 | California Association Football League | CAFL | San Francisco A.F.C. | - | - |
| 1912-1913 | California Association Football League | CAFL | Pastime Club | - | - |
| 1913-1914 | California Association Football League | CAFL | Pastime Club | - | - |
| 1914-1915 | California Football League | CFL | Pastime Club | - | - |
| 1915-1916 | California Football League | CFL | Olympic Club | - | - |
| 1916-1917 | California Football League | CFL | Union Iron Works | - | - |
| 1917-1918 | California Football League | CFL | Union Iron Works | - | - |
| 1918 | California Football League | CFL | - | - | - |
| 1918-1919 | California Football League | CFL | Moore Shipyards | - | - |
| 1919-1920 | California Football League | CFL | Thistle A.F.C. | - | - |
| 1920-1921 | California Football League | CFL | Thistle A.F.C. | - | - |
| Organizing body | Dates |
|---|---|
| California Association Football Union/California Football Association | Oct. 15, 1903 – date unknown |