The Eastern League began life as the New York-Pennsylvania League, which ran from 1923-1937; this league took on the Eastern League name in 1938. (This is not to be confused with the current New York-Pennsylvania League, which took its current name in 1939; it was known better by its informal name of PONY League between 1939 and 1956.) To complicate things even more, there was an Eastern League that ran between 1916 and 1932 unrelated to the current Eastern League.
Class B / 1923-1932
Class A / 1933-1962
Class AA / 1962-present
Current Teams
Akron Aeros
Altoona Curve
Binghamton Mets
Bowie Baysox
Erie SeaWolves
Harrisburg Senators
New Britain Rock Cats
New Hampshire Fisher Cats
Portland Sea Dogs
Reading Phillies
Richmond Flying Squirrels
Trenton Thunder
Teams (in alphabetical order)
Akron Aeros, 1997-present
Albany A’s, 1983
Albany Senators, 1937-1959
Albany-Colonie A’s, 1984
Albany-Colonie Yankees, 1985-1994
Allentown Brooks, 1935-1936
Allentown Cardinals, 1954-1956
Allentown Chiefs, 1957
Allentown Red Sox, 1958-1960
Altoona Curve, 1999-present
Berkshire Brewers, 1976
Binghamton Mets, 1992-present
Binghamton Triplets, 1923-1963, 1967-1968
Bristol Red Sox, 1973-1982
Bowie Baysox, 1993-present
Buffalo Bisons, 1979-1984
Canton-Akron Aeros, 1989-1996
Charleston Indians, 1962-1964
Connecticut Defenders, 2006-2009
Elmira Colonels, 1924-1932
Elmira Pioneers, 1935-1936, 1938-1955, 1962-1970
Elmira Red Jackets, 1923
Elmira Red Wings, 1933-1934, 1937
Elmira Royals, 1971-1972
Erie SeaWolves, 1999-present
Glens Falls Tigers, 1986-1988
Glens Falls White Sox, 1980-1985
Hagerstown Suns, 1898-1992
Hardware City (New Britain) Rock Cats, 1995-1996
Harrisburg Senators, 1924-1936, 1987-present
Hartford Bees, 1938-1946
Hartford Chiefs, 1947-1952
Hazleton Mountaineers, 1929-1932, 1934-1936
Hazleton Red Sox, 1937-1938
Holyoke Miller, 1977-1982
Jersey City A’s, 1978
Jersey City Indians, 1977
Johnstown Johnnies, 1955-1956
Johnstown Red Sox, 1961
Lancaster Red Roses, 1958-1961
London Tigers, 1989-1993
Lynn Sailors, 1980-1983
Manchester Yankees, 1970-1971
Nashua Angels, 1983
Nashua Pirates, 1984-1986
New Britain Red Sox, 1983-1994
New Britain Rock Cats, 1997-present
New Hampshire Fisher Cats, 2004-present
New Haven Ravens, 1994-2003
Norwich Navigators, 1995-2005
Oneonta Indians, 1924
Pawtucket Indians, 1965-1967
Pawtucket Red Sox, 1970-1972
Pittsfield Cubs, 1985-1988
Pittsfield Rangers, 1972-1975
Pittsfield Red Sox, 1965-1969
Pittsfield Senators, 1970-1971
Portland Sea Dogs, 1994-present
Quebec Carnavals, 1971-1975
Quebec Metros, 1976-1977
Reading Brooks, 1935
Reading Indians, 1952-1961, 1965
Reading Phillies, 1967-present
Reading Red Sox, 1933-1934, 1963-1964
Richmond Flying Squirrels, 2010-present
Schenectady Blue Jays, 1951-1957
Scranton Miners, 1923-1937, 1944-1953
Scranton Red Sox, 1939-1943
Shamokin Indians, 1926-1927
Shamokin Shammies, 1925
Sherbrooke Pirates, 1972-1973
Springfield Giants, 1957-1965
Springfield Nationals, 1939-1941
Springfield Rifles, 1942-1943
Syracuse Chiefs, 1956-1957
Syracuse Stars, 1928-1929
Thetford Mines Miners, 1974-1975
Trenton Thunder, 1994-present
Trenton Senators, 1936-1938
Trois Rivieres Aigles, 1971-1977
Utica Blue Sox, 1944-1950
Utica Braves, 1943
Utica Utes, 1924
Vermont Mariners, 1988
Vermont Reds, 1984-1987
Waterbury A’s, 1979
Waterbury Angels, 1984
Waterbury Dodgers, 1973-1976
Waterbury Giants, 1966-1967, 1977-1978
Waterbury Indians, 1968-1969, 1985-1986
Waterbury Pirates, 1970-1971
Waterbury Reds, 1980-1983
West Haven A’s, 1981-1982
West Haven Whitecaps, 1980
West Haven Yankees, 1972-1979
Williamsport A’s, 1953
Williamsport Billies, 1923
Williamsport Bills, 1987-1991
Williamsport Grays, 1924-1942, 1944-1946, 1950, 1954-1956, 1958-1962
Williamsport Mets, 1964-1967
Williamsport Tigers, 1947-1949, 1951-1952
Williamsport Tomahawks, 1976
Wilkes-Barre Barons, 1923-1947, 1953-1955
Wilkes-Barre Indians, 1948-1951
York Pirates, 1968-1969
York White Roses, 1923-1933, 1936, 1958-1959, 1962-1967
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