List of Boston Red Sox minor league affiliates

The Boston Red Sox of Major League Baseball (MLB) maintain a farm system consisting of four Minor League Baseball affiliates across the United States. Additionally, the Red Sox own and operate complex-based rookie level squads playing in the Florida Complex League in Florida and the Dominican Summer League in the Dominican Republic.

Of the non-complex based teams, the Portland Sea Dogs have been a Red Sox affiliate since 2003, the Greenville Drive have been an affiliate since 2005, the Salem RidgeYaks have been an affiliate since 2009, and the Worcester Red Sox entered their debut season in 2021. The Worcester Red Sox succeeded the Pawtucket Red Sox, who were a Red Sox affiliate from 1970 through 2020. The Salem RidgeYaks are owned by Fenway Sports Group, who also own the major league club, while the other three affiliates are independently owned.

Geographically, Worcester is Boston's closest domestic affiliate, located approximately from Fenway Park. Boston's furthest domestic affiliate is the Fenway South-based FCL Red Sox, located some away.

Current affiliates The Boston Red Sox farm system consists of seven minor league affiliates.

ClassTeamLeagueLocationBallparkAffiliated Triple-A Worcester Red Sox International League Worcester, Massachusetts Polar Park 2021 Double-A Portland Sea Dogs Eastern League Portland, Maine Hadlock Field 2003 High-A Greenville Drive South Atlantic League Greenville, South Carolina Fluor Field at the West End 2005 Single-A Salem RidgeYaks Carolina League Salem, Virginia Salem Memorial Ballpark 2009 Rookie FCL Red Sox Florida Complex League Fort Myers, Florida JetBlue Park 1989 DSL Red Sox Blue Dominican Summer League Santo Domingo El Toro Complex 1997 DSL Red Sox Red

List of affiliates by season The below tables list Red Sox affiliates for each season since the team established its first such relationship. Sections are grouped by era, based on changes in minor league classifications. Instances of the Red Sox sharing an affiliate with other MLB teams are independently counted in parentheses, with the partner team(s) listed in an endnote.

1928–1945 Major league teams had affiliate relationships with minor league teams as early as 1920, when the Detroit Tigers, Pittsburgh Pirates, and St. Louis Cardinals each had a farm team in the Texas League. The first team that had an affiliate relationship with the Red Sox was the Salem Witches of the New England League in 1928.

Prior to 1946, Double-A was the highest level of play in the minor leagues. Additional classifications were A through D, each of which was used by the Red Sox. Class A1 was created in 1936 and existed through 1945, and was also used by the Red Sox for several seasons. One Class E league existed in 1943, but was not used by the Red Sox.

YearDouble-AClass A1Class AClass BClass CClass DNo./Ref. 1928 — — Salem Witches — — 1 1929 — — — — — 0 1930 — — — — — 0 1931 — — — — — 0 1932 — — Hazleton MountaineersWilmington Pirates — — 2 1933 — Reading Red Sox — — — 1 1934 Kansas City Blues Reading Red Sox Columbia Sandlappers /Asheville Tourists Joplin Miners — 4 1935 — — Charlotte Hornets Shreveport Sports /Gladewater Bears Danville-Schoolfield Leafs 3 1936 San Diego PadresSyracuse Chiefs Little Rock Travelers Elmira Colonels Rocky Mount Red Sox Helena SeaportersCanton Terriers Danville-Schoolfield LeafsEau Claire Bears 9 1937 — Little Rock Travelers Hazleton Red Sox Rocky Mount Red Sox Brockville BluesClarksdale Red SoxCanton Terriers Elizabethton Betsy Red SoxDanville-Schoolfield LeafsOpelousas IndiansMoultrie PackersMansfield Red Sox 11 1938 Minneapolis Millers Little Rock Travelers Hazleton Red Sox Rocky Mount Red Sox Clarksdale Red SoxCanton Terriers Elizabethton Betsy Red SoxDanville-Schoolfield LeafsMoultrie PackersCrookston Pirates 10 1939 Louisville Colonels Little Rock Travelers Scranton Red Sox Rocky Mount Red Sox Clarksdale Red SoxCanton Terriers Elizabethton Betsy Red SoxDanville-Schoolfield LeafsCentreville Colts 9 1940 Louisville Colonels — Scranton Red Sox Rocky Mount Red Sox Canton Terriers Elizabethton Betsy Red SoxDanville-Schoolfield LeafsCentreville Red Sox 7 1941 Louisville Colonels — Scranton Red Sox Greensboro Red Sox Canton Terriers Danville-Schoolfield LeafsCentreville Red SoxOwensboro Oilers 7 1942 Louisville Colonels — Scranton Red Sox Greensboro Red Sox Oneonta IndiansCanton Terriers Danville-Schoolfield LeafsOwensboro Oilers 7 1943 Louisville Colonels — Scranton Red Sox Roanoke Red Sox — — 3 1944 Louisville Colonels — Scranton Red Sox Roanoke Red Sox — Middletown Red Sox 4 1945 Louisville Colonels — Scranton Red Sox Roanoke Red Sox Durham Bulls — 4

1946–1962 The minors operated with six classes (Triple-A, Double-A, and Classes A, B, C, and D) from 1946 to 1962. The Pacific Coast League (PCL) was reclassified from Triple-A to Open in 1952 due to the possibility of becoming a third major league. This arrangement ended following the 1957 season when the relocation of the National League's Dodgers and Giants to the West Coast ended any chance of the PCL being promoted.

YearTriple-A Double-AClass AClass BClass CClass DNo./Ref. 1946 Louisville Colonels New Orleans Pelicans Scranton Red Sox Lynn Red SoxRoanoke Red Sox Durham BullsOneonta Red Sox Geneva Red BirdsMilford Red SoxNew Iberia CardinalsTarboro Tars 11 1947 Louisville ColonelsToronto Maple Leafs New Orleans Pelicans Scranton Red Sox Lynn Red SoxRoanoke Red Sox Oneonta Red SoxSan Jose Red Sox Milford Red SoxWellsville Nitros 10 1948 Louisville Colonels Birmingham Barons Scranton Red Sox Lynn Red SoxRoanoke Red Sox Auburn CayugasEl Paso TexansOneonta Red SoxSan Jose Red Sox Milford Red SoxOroville Red SoxValley RebelsWellsville Nitros 13 1949 Louisville Colonels Birmingham Barons Scranton Red Sox Roanoke Red Sox Oneonta Red SoxSan Jose Red Sox Hornell Maple LeafsMarion Red SoxValley Rebels 9 1950 Louisville Colonels Birmingham Barons Scranton Red Sox Roanoke Red Sox Oneonta Red SoxSan Jose Red Sox Kinston EaglesMarion Red Sox 8 1951 Louisville Colonels Birmingham Barons Scranton Red Sox Roanoke Ro-Sox Oneonta Red SoxSan Jose Red Sox High Point-Thomasville Hi-TomsMarion Red Sox 8 1952 Louisville Colonels Birmingham Barons Albany Senators Roanoke Ro-Sox San Jose Red Sox High Point-Thomasville Hi-Toms 6 1953 Louisville Colonels — Albany Senators Greensboro PatriotsRoanoke Ro-Sox San Jose Red Sox Salisbury Rocots 6 1954 Louisville Colonels — Albany Senators Greensboro Patriots San Jose Red Sox Bluefield Blue-GraysCorning Red Sox 6 1955 Louisville Colonels — Montgomery Rebels Greensboro Patriots San Jose Red Sox Bluefield Blue-GraysCorning Red Sox 6 1956 San Francisco Seals Oklahoma City Indians Albany Senators Greensboro Patriots — Corning Red SoxLafayette Red SoxLexington Red Sox 8 1957 San Francisco Seals Oklahoma City Indians Albany Senators Greensboro Patriots — Corning Red SoxLafayette Red SoxLexington Red Sox 7 1958 Minneapolis Millers Memphis Chickasaws Allentown Red Sox Raleigh Capitals — Corning Red SoxLexington Red SoxWaterloo Hawks 7 1959 Minneapolis Millers — Allentown Red Sox Raleigh Capitals — Alpine CowboysCorning Cor-SoxWaterloo Hawks 6 1960 Minneapolis Millers — Allentown Red Sox Raleigh Capitals — Alpine CowboysCorning Red SoxWaterloo Hawks 6 1961 Seattle Rainiers — Johnstown Red Sox Winston-Salem Red Sox — Alpine CowboysOlean Red SoxWaterloo Hawks 6 1962 Seattle Rainiers — York White Roses Winston-Salem Red Sox Pocatello Chiefs Olean Red SoxWaterloo Hawks 6 Open classification (used by the PCL during 1952–1957) Sources:Official Baseball Guide. St. Louis, Missouri: The Sporting News, 1948.Official Baseball Guide. St. Louis, Missouri: The Sporting News, 1957.

1963–1989 The foundation of the minors' current structure was the result of a reorganization initiated by Major League Baseball (MLB) before the 1963 season. The reduction from six classes to four (Triple-A, Double-AA, Class A, and Rookie) was a response to the general decline of the minors throughout the 1950s and early-1960s when leagues and teams folded due to shrinking attendance caused by baseball fans' preference for staying at home to watch MLB games on television. The 1963 reorganization resulted in the Eastern and South Atlantic Leagues being elevated from Class A to Double-A, five of seven Class D circuits plus the ones in B and C upgraded to A, and the Appalachian League reclassified from D to Rookie. The only change made within the next 27 years was some Class A teams adopting "Short Season" schedules starting in 1965.

YearTriple-ADouble-AClass AClass A Short SeasonRookie LeagueNo./Ref. 1963 Seattle Rainiers Reading Red Sox Waterloo HawksWellsville Red SoxWinston-Salem Red Sox — 5 1964 Seattle Rainiers Reading Red Sox Waterloo HawksWellsville Red SoxWinston-Salem Red SoxStatesville Colts — 5(1) 1965 Toronto Maple Leafs Pittsfield Red Sox Waterloo HawksWellsville Red SoxWinston-Salem Red Sox — Harlan Red Sox 6 1966 Toronto Maple Leafs Pittsfield Red Sox Oneonta Red SoxWaterloo HawksWinston-Salem Red Sox — Covington Red Sox 6 1967 Toronto Maple Leafs Pittsfield Red Sox Greenville Red SoxWaterloo HawksWinston-Salem Red Sox — — 5 1968 Louisville Colonels Pittsfield Red Sox Greenville Red SoxWaterloo HawksWinston-Salem Red Sox Jamestown Falcons — 6 1969 Louisville Colonels Pittsfield Red Sox Greenville Red SoxWinston-Salem Red SoxWinter Haven Red Sox Jamestown Falcons — 6 1970 Louisville Colonels Pawtucket Red Sox Greenville Red SoxWinston-Salem Red SoxWinter Haven Red Sox Jamestown Falcons — 6 1971 Louisville Colonels Pawtucket Red Sox Greenville Red SoxWinston-Salem Red SoxWinter Haven Red Sox Williamsport Red Sox — 6 1972 Louisville Colonels Pawtucket Red Sox Winston-Salem Red SoxWinter Haven Red Sox Williamsport Red Sox — 5 1973 Pawtucket Red Sox Bristol Red Sox Winston-Salem Red SoxWinter Haven Red Sox Elmira Pioneers — 5 1974 Pawtucket Red Sox Bristol Red Sox Winston-Salem Red SoxWinter Haven Red Sox Elmira Red Sox — 5 1975 Pawtucket Red Sox Bristol Red Sox Winston-Salem Red SoxWinter Haven Red Sox Elmira Red Sox — 5 1976 Pawtucket Red Sox Bristol Red Sox Winston-Salem Red SoxWinter Haven Red Sox Elmira Red Sox — 5 1977 Pawtucket Red Sox Bristol Red Sox Winston-Salem Red SoxWinter Haven Red Sox Elmira Pioneer-Red Sox — 5 1978 Pawtucket Red Sox Bristol Red Sox Winston-Salem Red SoxWinter Haven Red Sox Elmira Red Sox — 5 1979 Pawtucket Red Sox Bristol Red Sox Winston-Salem Red SoxWinter Haven Red Sox Elmira Pioneers — 5 1980 Pawtucket Red Sox Bristol Red Sox Winston-Salem Red SoxWinter Haven Red Sox Elmira Pioneers — 5 1981 Pawtucket Red Sox Bristol Red Sox Winston-Salem Red SoxWinter Haven Red Sox Elmira Suns — 5 1982 Pawtucket Red Sox Bristol Red Sox Winston-Salem Red SoxWinter Haven Red Sox Elmira Suns — 5 1983 Pawtucket Red Sox New Britain Red Sox Winston-Salem Red SoxWinter Haven Red Sox Elmira Suns — 5 1984 Pawtucket Red Sox New Britain Red Sox Winston-Salem SpiritsWinter Haven Red Sox Elmira Pioneers — 5 1985 Pawtucket Red Sox New Britain Red Sox Greensboro HornetsWinter Haven Red Sox Elmira Pioneers — 5 1986 Pawtucket Red Sox New Britain Red Sox Greensboro HornetsWinter Haven Red Sox Elmira Pioneers — 5 1987 Pawtucket Red Sox New Britain Red Sox Greensboro HornetsWinter Haven Red Sox Elmira Pioneers — 5 1988 Pawtucket Red Sox New Britain Red Sox Lynchburg Red SoxWinter Haven Red Sox Elmira Pioneers AZL Mariners/Red Sox 5(1) 1989 Pawtucket Red Sox New Britain Red Sox Lynchburg Red SoxWinter Haven Red Sox Elmira Pioneers GCL Red SoxDSL cooperative 6(1) Sources:Official Baseball Record Book. St. Louis, Missouri: The Sporting News, 1963.Official Baseball Dope Book. St. Louis, Missouri: The Sporting News, 1965.Official Baseball Dope Book. St. Louis, Missouri: The Sporting News, 1974.Official Baseball Dope Book. St. Louis, Missouri: The Sporting News, 1979.

1990–2020