the amateur draft. The Class A-Advanced designation was established in 1990, between Class A and Double-A in the minor league hierarchy. Class A and Class A Short Season were considered independent classifications, with Class A having "Full-Season" and Advanced sub-classifications, per the rules governing baseball's minor leagues. The overall hierarchy was: Triple-A Double-A Class A-Advanced Class A ("Full-Season A") Class A Short Season ("Short-Season A") Rookie league Entering the 2020 minor league season (which was not played due to the COVID-19 pandemic), Class A consisted of the Midwest League and South Atlantic League (a newer "Sally League", which been formed in 1963 as the Western Carolinas League). Prior to the 2021 season, MLB restructured the minor leagues, eliminating Class A Short Season and discontinuing the use of all historical league names within Minor League Baseball. The Midwest League and South Atlantic League were reclassified as "High-A" leagues, and operated during 2021 as High-A Central and High-A East, respectively. They were replaced at the Class A level by three "Low-A" leagues: Low-A West, Low-A East, and Low-A Southeast. These leagues had historically been known as the California League, Carolina League, and Florida State League, respectively, and had previously operated at the Class A-Advanced level. These three leagues operated with Low-A naming for the 2021 season. Following MLB's acquisition of the rights to the names of the historical minor leagues, MLB announced on March 16, 2022, that the leagues would revert to their prior names, effective with the 2022 season. MLB also discontinued use of "Low-A" in favor of Single-A. Current teams Florida State League Carolina League California League Playoffs On June 30, 2021, Minor League Baseball announced that the top two teams in each league (based on full-season winning percentage, and regardless of division) would meet in a best-of-five postseason series to determine league champions. References External links Minor league baseball Carolina League Florida State League California League