- Location: Rohnert Park, CA
- League: California League 1980-1985
- Affiliation: Co-op 1980; California Angels 1981-1985
The 1980 Pioneers received players from the Cleveland Indians and San Diego Padres, with help from the Oakland A's and California Angels and minor help from the Chicago White Sox and Pittsburgh Pirates.
|1983||73-65||5th||Jack Lind||League Champs|
|1984||91-48||1st||Tom Kotchman||Lost in 1st round|