The Baltimore Orioles farm system consists of seven Minor League Baseball affiliates in the United States and the Dominican Republic. Four teams are independently owned, while the other three—the Florida Complex League Orioles and two Dominican Summer League Orioles squads—are owned by the major league club.
The Orioles have been affiliated with the Double-A Chesapeake Baysox of the Eastern League since 1993, making it the longest-running active affiliation in the organization among teams not owned by the Orioles. Their newest affiliate is the Frederick Keys of the South Atlantic League, which will become the Orioles' High-A club in 2026. The longest affiliation in team history was the 53-year relationship with the Rookie Appalachian League's Bluefield Orioles from 1958 to 2010.
The Orioles have the shortest cumulative distance between its four full-season minor league affiliates in baseball at .Eddy, Matt. "Numbers Game: Infrequent Flyers," Baseball America, April 6, 2018. Retrieved April 21, 2018 The top four affiliates are located within a radius from Baltimore, with three of them situated in Maryland. Geographically, Baltimore's closest domestic affiliate is the Baysox of the Double-A Eastern League, which is approximately away. Baltimore's furthest domestic affiliate is the Florida Complex League Orioles of the Rookie Florida Complex League some away.
Current affiliates The Baltimore Orioles farm system consists of seven minor league affiliates.
ClassTeamLeagueLocationBallparkAffiliated Triple-A Norfolk Tides International League Norfolk, Virginia Harbor Park 2007 Double-A Chesapeake Baysox Eastern League Bowie, Maryland Prince George's Stadium 1993 High-A Frederick Keys South Atlantic League Frederick, Maryland Nymeo Field at Harry Grove Stadium 2026 Single-A Delmarva Shorebirds Carolina League Salisbury, Maryland Arthur W. Perdue Stadium 1997 Rookie FCL Orioles Florida Complex League Sarasota, Florida Ed Smith Stadium 2007 DSL Orioles Black Dominican Summer League San Antonio de Guerra, Santo Domingo Baltimore Orioles Dominican Academy 1996 DSL Orioles Orange
Past affiliates 2021–present The current structure of Minor League Baseball is the result of an overall contraction of the system beginning with the 2021 season. Class A was reduced to two levels: High-A and Low-A. Class A Short Season teams and domestic Rookie League teams that operated away from Spring Training facilities were eliminated.Brown, Maury. "MLB Invites 119 Clubs To Be Minor League Affiliates; Here’s Who Made It And Who Didn’t," Forbes, Wednesday, December 9, 2020. Retrieved December 9, 2020 Low-A was reclassified as Single-A in 2022.
YearTriple-ADouble-AHigh-ASingle-ARookie LeagueForeign Rookie 2026Norfolk TidesTrezza, Joe. "O's extend invites to Minor League affiliates," MLB.com, Wednesday, December 9, 2020. Retrieved December 9, 2020Hall, David. "Norfolk Tides to remain Orioles’ affiliate for another decade," The Virginian-Pilot (Newport News, VA), Wednesday, February 10, 2021. Retrieved February 10, 2021Chesapeake Baysox"Meet the Chesapeake Baysox! Orioles' Double-A affiliate gets a new look," MLB.com, Friday, November 22, 2024. Retrieved May 29, 2025Frederick Keys"Attain Sports Announces Reorganization of Baseball Teams, Bringing High-A Affiliated Baseball Back to Frederick and MLB Draft League to Aberdeen Beginning in 2026," Attain Sports press release, Friday 1 August 2025. Retrieved 6 August 2025.Delmarva ShorebirdsFCL OriolesDSL Orioles BlackDSL Orioles Orange 2025Aberdeen IronBirdsMcRoberts, Randy. "Aberdeen IronBirds to play High-A baseball as part of MLB’s new Minor League agreement, unsure on timetable," The Aegis (Bel Air, MD), Friday, February 12, 2021. Retrieved February 12, 2021 2024Bowie Baysox"Baysox Officially Accept Invitation To Remain Double-A Affiliate of the Baltimore Orioles," Bowie Baysox, Thursday, February 11, 2021. Retrieved February 12, 2021 2023 2022 2021
1990–2020 Minor League Baseball operated with six classes from 1990 to 2020. The Class A level was subdivided for a second time with the creation of Class A-Advanced. The Rookie level consisted of domestic and foreign circuits.
YearTriple-ADouble-AClass A-AdvancedClass AClass A Short SeasonRookie LeagueForeign Rookie 2020Norfolk Tides"Tides sign affiliation agreement with Baltimore Orioles", Baltimore Orioles press release, Monday, September 25, 2006.Bowie Baysox"Orioles extend working agreements with Minor League affiliates in Norfolk, Bowie and Frederick through 2014", Baltimore Orioles press release, Thursday, August 12, 2010.Frederick KeysSwatek, Greg. "Keys part ways with Orioles, join MLB Draft League," The Frederick News-Post, Wednesday, December 9, 2020. Retrieved December 9, 2020Delmarva Shorebirds"Orioles extend working agreements with Bowie, Frederick and Delmarva", Baltimore Orioles press release, Monday, October 2, 2006.Aberdeen IronBirdsGoldberg, Stan "Pumping some iron in Aberdeen" The Frederick News-Post, Thursday, August 5, 2004GCL OriolesDSL Orioles 1DSL Orioles 2 2019 2018DSL Orioles 2017 2016DSL Orioles 1DSL Orioles 2 2015 2014 2013 2012DSL Orioles 2011 2010Bluefield OriolesDrellich, Evan. "Orioles end affiliation with Bluefield club", MLB.com, Sunday, August 29, 2010.GCL Orioles"Orioles will drop Venezuelan team for 2007", Baltimore Orioles press release, Wednesday, February 14, 2007. DSL Orioles 1DSL Orioles 2 2009DSL Orioles 2008 2007 2006Ottawa Lynx"Orioles sign affiliation with Ottawa", Baltimore Orioles press release, Tuesday, September 24, 2002.Bluefield OriolesDSL OriolesVSL Orioles 2005 2004 DSL OriolesVenoco 2 2003Bluefield OriolesGCL Orioles DSL OriolesYaritagua 2002Rochester Red Wings DSL OriolesCabudare 2001 — DSL Orioles 2000 — 1999 — 1998 — 1997 — 1996Frederick KeysHigh Desert MavericksTeam History – High Desert Mavericks. — — 1995 — — — 1994Frederick KeysAlbany PolecatsBaker, Kent "South Atlantic League will have Delmarva Shorebirds next season Kirk group buying team, will move it to Salisbury" The Baltimore Sun, Thursday, September 21, 1995"O's, Polecats agree" Associated Press, Thursday, October 1, 1992 — — 1993 — — 1992Hagerstown SunsParasiliti, Bob "Hagerstown Suns sign two-year pact to remain affiliated with Nationals" The Herald-Mail (Hagerstown, Maryland), Wednesday, September 22, 2010Kane County CougarsGauthier, Tom. "Introducing the Kane County Cougars", Bowling Green Hot Rods, Wednesday, October 21, 2009. — — 1991 — — 1990 Wausau Timbers — Bluefield Orioles —
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 only change made within the next 27 years was Class A being subdivided for the first time to form Class A Short Season in 1966.
(The Orioles were involved in minor league affiliate co-op agreements twice—the Pulaski Phillies with various other MLB clubs in 1976 and the Daytona Beach Islanders with the Texas Rangers in 1985.)
YearTriple-ADouble-AClass AClass A Short SeasonRookie League 1989Rochester Red Wings Hagerstown SunsTeam History – Hagerstown Suns. Frederick KeysErie OriolesBluefield Orioles 1988 Charlotte KnightsTeam History – Charlotte Knights.Hagerstown Suns 1987Charlotte OriolesNewark Orioles 1986 1985 Hagerstown Suns, Daytona Beach IslandersRhodes, Beth "FSL Expansion Islanders A Mix Of Orioles, Rangers" Orlando (FL) Sentinel, Wednesday, April 10, 1985Rhodes, Beth "White Sox To Field Class A Team In Daytona Beach" Orlando (FL) Sentinel, Wednesday, December 10, 1986 1984 Hagerstown Suns 1983 Hagerstown Suns, San Jose Bees 1982 Hagerstown Suns — 1981Miami Orioles — 1980 — 1979Official Baseball Dope Book. St. Louis, Missouri: The Sporting News, 1979. — 1978 — 1977 — 1976 — Bluefield OriolesPulaski Phillies 1975Asheville OriolesMiami Orioles, Lodi Orioles"Lodi is dropped by Baltimore Orioles; Cal League future in doubt" Lodi (CA) News-Sentinel, Saturday, September 27, 1975"Spring training: Lodi Orioles doing well in fine weather" Lodi (CA) News-Sentinel, Friday, March 29, 1974 —Bluefield Orioles 1974Official Baseball Dope Book. St. Louis, Missouri: The Sporting News, 1974. — 1973 Miami Orioles, Lodi Lions — 1972 Miami Orioles, Lodi Orions Lewiston Broncs 1971Dallas-Fort Worth SpursGuinn, Jeff & Bragan, Bobby. When Panthers Roared: The Fort Worth Cats and Minor League Baseball. Fort Worth, Texas: TCU Press, 1999. Miami Orioles, Stockton PortsTeam History – Stockton Ports.Aberdeen PheasantsHorwath, Bryan. "Business: Could pro baseball return to Aberdeen?" American News (Aberdeen, South Dakota), Thursday, September 25, 2014. 1970Miami Marlins, Stockton Ports 1969 1968Elmira Pioneers 1967 1966 1965Official Baseball Dope Book. St. Louis, Missouri: The Sporting News, 1965. Tri-City Atoms,Northwest League of Professional Baseball 2012 Media Guide. Stockton Ports, Fox Cities Foxes,Team History – Wisconsin Timber Rattlers. Aberdeen Pheasants — 1964Stockton Ports, Fox Cities Foxes, Aberdeen Pheasants — 1963Official Baseball Record Book. St. Louis, Missouri: The Sporting News, 1963. —
1954–1962 The minors operated with six levels (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 killed any chance of the PCL being promoted. 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.
YearTriple-A Double-AClass AClass BClass CClass D 1962Rochester Red Wings — Elmira Pioneers —Stockton PortsAberdeen Pheasants Bluefield OriolesFox Cities Foxes 1961 Little Rock TravelersVictoria/Ardmore Rosebuds — Fox Cities FoxesTri-Cities BravesBluefield OriolesLeesburg Orioles 1960Vancouver MountiesMiami Marlins — — Fox Cities Foxes 1959 Amarillo Gold Sox — — Bluefield OriolesPensacola Dons 1958 Vancouver MountiesLouisville Colonels —Knoxville Smokies Wilson Tobs Aberdeen Pheasants Bluefield OriolesPensacola DonsFitzgerald Orioles 1957Official Baseball Guide. St. Louis, Missouri: The Sporting News, 1957.Vancouver Mounties (Open)San Antonio MissionsKing, David. San Antonio at Bat: Professional Baseball in the Alamo City. College Station, Texas: Texas A&M University Press, 2004. — Aberdeen PheasantsPhoenix Stars Paris OriolesThomson OriolesFitzgerald Orioles 1956 Columbus Foxes York White RosesLubbock Hubbers/Texas City Texans Aberdeen PheasantsThetford Mines MinersPhoenix Stars Paris OriolesThomson Orioles 1955 — Wichita Indians York White RosesFayetteville Highlanders Aberdeen PheasantsThetford Mines Miners Paris OriolesCordele Orioles 1954 — Wichita IndiansLewiston Broncs York White RosesAnderson Rebels Aberdeen PheasantsHolmes, Devena. "Pheasant Park (AKA Aberdeen Municipal Ballpark)(AKA Johnson Field)", Aberdeen (SD) Area History, Friday, June 1, 2012.Thetford Mines MinersPine Bluff Judges Americus-Cordele OriolesWytheville StatesmenMarion MaraudersAda Herefords/Cementers
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