The Florida State League is a minor baseball league based in the state of Florida. It is one of three leagues currently classified as Class A-Advanced, the third highest classification of minor leagues. Each team in the league is affiliated with a Major League Baseball team, and most play in their affiliate's spring training facility. The league was founded in 1919, and has continued almost entirely uninterrupted to the present day. Most players in the Florida State League do not reach this level until their third or fourth year of professional play.