The Pacific Association of Professional Baseball Clubs ( is an independent professional baseball league that is based in Northern California.  Play began in 2013 and the league recently completed its fourth season in 2017.  The league is currently comprised of six teams: San Rafael Pacifics, Sonoma Stompers, Vallejo Admirals, Pittsburg Diamonds, Napa Silverados, and Martinez Clippers

The league is an outgrowth of a long history of independent baseball on the West Coast, beginning with the Golden State League (1995), the Western League (1995-2002), the Golden League (2004-2010) and the North American Baseball League (2011-2012).

In 2012, the Pacifics, Sonoma County Grapes and the Hawaii teams (Maui Na Koa Ikaika & Hawaii Stars (Hilo) participated in the North Division of the North American League.  The Pacifics nosed out the Maui squad for the championship.

In 2013, Maui returned the favor by edging out the Pacifics for the Pacific Association championship after the Pacifics compiled a 54-21 (.720) record to win the division race by 8 games.

In 2014, the Pacifics again won the championship after defeating the Vallejo Admirals in the last game of the second half of the regular season.

2015 saw one of the most dramatic finishes in league history, where the Pacifics used a 22-5 finish to claim the second half title and take over the overall standings to host the championship game. The Pacifics took their second straight title, and thrid overall, in walkoff fashion.

2016 saw a changing of the guard at the top, as the Sonoma Stompers won their first Pacific Association championship.

In 2017, the Stompers pillaged through the first half, finishing with a league best 28-11 record. However, while the Stompers went 24-15 in the second half, the Vallejo Admirals came on strong, beating Sonoma in a head to head tiebreaker and with a 24-15 second half record, they forced a championship game, which they won 11-8 to claim their first Pacific Association title.                                                                                                                                              

The league expands to six teams in 2018 with the additions of the Napa Silverados and Martinez Clippers


San Rafael Pacifics      Sonoma Stompers 
Pacifics P     Stompers cap S
Vallejo Admirals     Pittsburg Diamonds
 VA 5Stars V logo     Pittsburg
Napa Silverados     Martinez Clippers
 VA 5Stars V logo     Martinez Clippers Circle Logo RGB Colors Vector      

 Pacific Association Officers

Jonathan Stone - Commissioner


After 26 years of owning a successful marketing company in San Francisco, Jonathan Stone turned his attention to his lifelong love of baseball. First working with one of the teams in the league and since 2017 as Commissioner. Under Stone's leadership the league continues to grow in 2018 adding two new teams and expanded playoffs to the only independent professional baseball league on the west coast.

Hayley Slye - Media Relations Director

Hayley M. Slye is in her second season with the Sonoma Stompers. She oversees all league media. A graduate of Cal State Fullerton, Slye served as the Editor-in-Chief and sports editor of her college newspaper. Her sportswriting work has won two California Newspaper Publisher Association awards and has been published in Baseball Prospectus, Sports Illustrated online and When she’s not at work, she’s doting on her Chihuahua mix, Cash.