Williamsport MLB Affiliation History
Boston: 1971-1972
Chicago (NL): 1994-1998
Cleveland: 1932, 1976, 1987-1988
Co-Op Team: 1968
Detroit: 1946-1952
Houston: 1969-1970
New York (NL): 1964-1967, 1991
Philadelphia (AL): 1933-1942, 1953
Philadelphia (NL): 1958-1962, 2007-2020
Pittsburgh: 1924, 1954-1956, 1999-2006
Seattle: 1989-1990
Washington: 1944-1945
Williamsport League History
Pennsylvania State Assoc.: 1886-1887, 1891, 1902
Central Pennsylvania League: 1897-1898
Tri-State League: 1904-1910
New York-Penn League: 1923-1937, 1968-1972, 1994-2020
Eastern League: 1938-1942, 1944-1956, 1958-1962, 1964-1967, 1976, 1987-1991
MLB Draft League: 2021- present