The Miami Marlins were a minor league baseball team based in Miami, Florida. The original Marlins were a Triple-A franchise in the International League from 1956 through 1960. The International League team was succeeded by a Single-A team in the Florida State League (now the Fort Myers Miracle) and today's Miami Marlins of Major League Baseball.
The International League Marlins were a transplanted version of the original Syracuse Chiefs. They were created on December 20, 1955, when the Syracuse club (a member of the IL as early as 1886 and a continuous member since 1934) was sold to Sidney Salomon (future founding owner of the St. Louis Blues of the National Hockey League) and Elliot Stein.
The 1955 Chiefs, an affiliate of the Philadelphia Phillies, finished only two games out of the playoffs, but drew only 85,000 fans, last in the eight-team league. In the Marlins' debut season in Miami, the club finished third and attracted 288,000 spectators, second in the IL circuit. Attendance dwindled in the years that followed, however, and by 1960 the Marlins—by then a Baltimore Orioles affiliate—were at the bottom of the IL, with fewer than 110,000 paying fans. 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.