The 1910 version was actually class B until June 6, when it became class D. Sacramento and San Francisco dropped out May 31, and Oakland moved to Merced on June 7, which might explain the drop in classification.
Then Fresno disbanded June 24, causing the league to cease operations the same day.
When it was re-tried in 1915, the league disbanded May 30, due to heavy rains, with the teams having played only 5 to 7 games.
1913 California State League Vallejo (24–33) moved to Watsonville July 6.
1929 California State League Santa Ana (4–20) moved to Pomona May 8, which played six games at San Bernardino.Pomona (2–4) moved to Coronado County May 15, playing their games at the San Diego ball park.The league disbanded June 17.