The
California League, which began in 1879, had a four-year interruption and in 1895, four teams started playing during the winter months. The teams, located in Los Angeles, Oakland, San Francisco and San Jose played for one month but by 1897 the Northern California Winter League was formed. It consisted of teams located in four cities: Oakland, Sacramento, San Francisco and Sacramento. and began as the Southern California Winter League before its name was shortened. By 1915, the California League had folded, unable to withstand competition from the
Pacific Coast League (PCL). The California Winter League, originally known as the Southern California Winter League, began as a semi-pro level league in 1900 and was graded at "probably Class A level by 1910." Eleven all-white teams opened the 1906–07 season. Teams included: Anaheim, Fullerton, Hamburgers, Hoegee Flags, Los Angeles Morans, Los Angeles Pacifics, Pasadena, San Bernardino, San Diego, Santa Barbara, and Tufts-Lyons. To begin the 1908–09 season, the league comprised 11 teams, including the Santa Ana Yellow Sox who featured
starting pitcher Walter Johnson. ==Integration (1910)==