In 2012, the Lumberjacks faced their first professional opponent in a spring training exhibition game against the San Rafael Pacifics of the North American League.
[2] On February 6, 2013, it was announced the Lumberjacks would be playing against Hawaii, Maui, San Rafael and Vallejo of the newly formed Pacific Association.
[5] East Bay then traveled to Hawaii where they played six regular season games against the Stars and Na Koa Ikaika.
[7] On July 5, the Pacific Association announced the admission of the East Bay Lumberjacks as a full league member.
[13] In the winter of 2014, the Lumberjacks rejoined the semi-professional ranks in a four-team San Francisco Money League, where they played from November to February.