[1] During the initial season, two Hawaii-based teams, the Hawaii Stars and the Maui Warriors, played inter-league games against the Baseball Challenge League of Japan; California teams played against the Freedom Pro League of Arizona.

[2] Both Hawaii teams ceased operations after playing the 2013 season citing high travel costs of bringing in opponents from Northern California.

Two expansion clubs were added in 2014 (the Sonoma Stompers and Pittsburg Mettle) bringing the total number of teams to four.

In 2017 San Francisco businessman and entrepreneur Jonathan Stone was named league commissioner.

The California Dogecoin was listed as an expansion team on the league website, but after the season was postponed by the COVID-19 pandemic were removed without having played a game.