1940 San Francisco Seals
The Seals were charter member of the famed Pacific Coast League in 1903. The Seals played in Seals Stadium from 1931 until 1957 when they moved to Phoenix to make room for the Giants. The Giants used Seals Stadium in 1958 and 1959 and then moved into the new Candlestick Park in 1960.
The most famous Seal was Joe DiMaggio who once had a 61 game hitting streak while playing for the Seals.
Great Book about the PCL:The Pacific Coast League, 1903-1988
Another about the Seals: