Southern California League was unclassified in 1886, 1899-1900. And Class D in 1913. (1908?) All teams were based in California.
1886 San Luis Obispo Mutuals, San Luis Obispo R.S., Tulare
1899 Los Angeles Angels, Los Angeles Merchants, San Bernardino, San Diego
1900 Azusa, Los Angeles Merchants, Los Angeles-Pacific, San Diego
1908 unknown teams
1913 Long Beach, Pasadena, Santa Barbara, San Bernardino. San Bernardino moved to San Diego during the season.