The San Rafael Pacifics entered the season as defending champions, having defeated the Sonoma Stompers 6–0 in the league's 2018 championship game.
The top four teams would qualify for the playoffs with the regular season champion getting a bye to the best-of-three championship series.
as of September 1, 2019 [6] To qualify as league leader for hitter, AVG - Minimum of plate appearances of 2.7 per team game.
To qualify as league leader for pitcher, ERA - Minimum inning(s) of .8 pitched per team game.
[7] In 2019, The top four teams would qualify for the playoffs with the regular season champion getting a bye to the best-of-three championship series.