San Francisco Pirates

[1] In 1903, the San Francisco "Pirates" team became charter members of the eight–team Class A level Pacific National League.

[7] The Pacific National League began play with teams based in Seattle (Seattle Chinooks), Los Angeles (Los Angeles Nationals), Portland (Portland Green Gages) and San Francisco, cities which all also hosted teams in the Pacific Coast League.

The Butte Miners, Helena Senators, Spokane Indians and Tacoma Tigers completed the league.

[10][4] San Francisco did not host a team when the Pacific National League continued play in 1904.

[12] The 1903 San Francisco Pirates hosted home minor league games at National Park.