On Tuesday, August 20, 2013 the Oakland Athletics announce that they will be extending the Player Development Contract (PDC) through the 2016 season with the Stockton Ports. Prior to the extension the Athletics were under contract with the Ports through the 2014 season. The Stockton Ports have been the Class A High affiliate of the Oakland Athletics since 2005. Prior to the move to Stockton that Athletics affiliate was the Modesto A’s from 1975-2004. The Athletics have been the only affiliate with the Ports since Banner Island Ballpark opened in 2005.
The Ports are 1 of 5 affiliates of the Oakland Athletics. The others include: Sacramento RiverCats (AAA), Midland RockHounds (AA), Beloit Snappers (A Low) and Vermont Lake Monsters (A Short Season).