In 1955, Johnson City and the
Salem Rebels were declared co-champions of the
Appalachian League when their final playoff series was canceled due to rain. From 1986 to 2019, Johnson City reached the playoffs by virtue of winning their division or clinching a playoff spot eight times. The results of their postseason play during this time was as follows. • 1986: Lost to
Pulaski 2–1 in finals. • 1987: Lost to
Burlington 2–0 in finals. • 1994: Lost to
Princeton 2–1 in finals. • 2010: Defeated
Burlington 2–0 in semifinals; defeated
Elizabethton 2–0 to win championship. • 2011: Defeated
Danville 2–1 in semifinals; defeated
Bluefield 2–1 to win championship. • 2012: Lost to
Burlington 2–1 in semifinals. • 2014: Defeated
Elizabethton 2–1 in semifinals; defeated
Danville 2–1 to win championship. • 2016: Defeated
Elizabethton 2–1 in semifinals; defeated
Burlington 2–0 to win championship. • 2019: Defeated
Bristol 2–1 in semifinals; defeated
Burlington 2–1 to win championship. ==Notable alumni==