The franchise signed a working agreement with the St. Louis Cardinals .
The franchise moved to San Juan , Puerto Rico , in 1961 , but after little more than a month of play the Marlins moved again to Charleston , West Virginia , on May 19 .
The franchise signed a working agreement with the St. Louis Cardinals and moved to San Juan , Puerto Rico , in 1961 , but after little more than a month of play the Marlins moved again to Charleston , West Virginia , on May 19 .