# List of Athletics minor league affiliates

The Athletics farm system consists of six Minor League Baseball affiliates across the United States and in the Dominican Republic. Four teams are independently owned, while two—the Arizona Complex League Athletics and Dominican Summer League Athletics—are owned by the major league club.
The Athletics have been affiliated with the Double-A Midland RockHounds of the Texas League since 1999, making it the longest-running active affiliation in the organization among teams not owned by the Athletics. The longest affiliation in team history was the 30-year relationship with the Class A-Advanced California League's Modesto A's from 1975 to 2004. Their newest affiliate is the Lansing Lugnuts of the Midwest League, which became the Athletics' High-A club in 2021.
Geographically, the Athletics' closest domestic affiliate is the Single-A Stockton Ports of the California League, which are approximately 45 miles (72 km) away. Their furthest domestic affiliate is the Lansing Lugnuts, which are approximately 1,943 miles (3,127 km) away.

## Current affiliates

The Athletics farm system consists of six minor league affiliates.
| Class | Team | League | Location | Ballpark | Affiliated |
| Triple-A | Las Vegas Aviators | Pacific Coast League | Summerlin, Nevada | Las Vegas Ballpark | 2019 |
| Double-A | Midland RockHounds | Texas League | Midland, Texas | Momentum Bank Ballpark | 1999 |
| High-A | Lansing Lugnuts | Midwest League | Lansing, Michigan | Jackson Field | 2021 |
| Single-A | Stockton Ports | California League | Stockton, California | Banner Island Ballpark | 2005 |
| Rookie | ACL Athletics | Arizona Complex League | Mesa, Arizona | Fitch Park | 1988 |
| Rookie | DSL Athletics | Dominican Summer League | Boca Chica, Santo Domingo | Juan Marichal Complex | 1989 |

## Past affiliates
### Key

| Season | Each year is linked to an article about that particular Athletics season. |

### 1923–1962

Minor League Baseball operated with five classes (Double-A, Class A, Class B, Class C, and Class D) from 1923 to 1935. Class A1, between Double-A and Class A, was added in 1936. The minors continued to operate with these six levels through 1945. Triple-A was established as the highest classification in 1946, and Class A1 became Double-A, with Class A through D remaining. These six levels continued through 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.
| Season | Triple-A | Double-A | Class A | Class B | Class C | Class D |
| 1923 | — | — | Shreveport Gassers | — | — | — |
| 1924 | — | — | Shreveport Gassers | — | — | — |
| 1925 | — | — | — | — | — | — |
| 1926 | — | — | — | — | — | — |
| 1927 | — | — | — | — | — | — |
| 1928 | — | — | — | — | — | — |
| 1929 | — | — | — | — | — | — |
| 1930 | — | — | — | — | — | — |
| 1931 | — | — | — | — | — | — |
| 1932 | — | Portland Beavers | — | — | — | — |
| 1933 | — | — | Williamsport Grays | — | — | — |
| 1934 | — | — | Williamsport Grays | — | — | — |
| 1935 | — | — | Williamsport Grays | Richmond Colts | — | — |
| 1936 | — | — | Williamsport Grays | Richmond Colts | Cleveland A's | — |
| 1937 | — | — | Williamsport Grays | — | — | Federalsburg A's |
| 1938 | — | — | Williamsport Grays | — | — | Federalsburg A's Lexington Indians |
| 1939 | — | — | Williamsport Grays | — | — | Abbeville A's Federalsburg A's Lexington Indians |
| 1940 | — | Toronto Maple Leafs | Williamsport Grays | Wilmington Blue Rocks | — | Federalsburg A's |
| 1941 | — | Toronto Maple Leafs | Williamsport Grays | Wilmington Blue Rocks | Newport News Pilots | Federalsburg A's |
| 1942 | — | — | Williamsport Grays | Wilmington Blue Rocks | Newport News Builders | — |
| 1943 | — | — | Elmira Pioneers | Wilmington Blue Rocks | — | — |
| 1944 | — | — | Elmira Pioneers | Lancaster Red Roses | — | — |
| 1945 | — | Toronto Maple Leafs | — | Lancaster Red Roses | Martinsville A's | Lexington A's |
| 1946 | Toronto Maple Leafs | — | Savannah Indians | Lancaster Red Roses | Kingston Ponies Martinsville A's | Federalsburg A's Lexington A's |
| 1947 | — | Birmingham Barons | Lincoln A's Savannah Indians | Lancaster Red Roses | Martinsville A's Moline A's Niagara Falls Frontiers | Federalsburg A's Lexington A's Nyack Rocklands Red Springs Red Robins Welch Miners |
| 1948 | — | — | Lincoln A's Savannah Indians | — | Martinsville A's Moline A's / Kewanee A's | Federalsburg A's Lexington A's Moultrie A's Portsmouth A's Red Springs Red Robins Welch Miners |
| 1949 | — | — | Lincoln A's Savannah Indians | Martinsville A's | Kewanee A's Youngstown A's | Lexington A's Moultrie A's Portsmouth A's Red Springs Red Robins Tarboro A's Welch Miners |
| 1950 | Buffalo Bisons | — | Lincoln A's Savannah Indians | Fayetteville A's Sunbury A's West Palm Beach Indians | Youngstown A's | Cordele A's Lexington A's Portsmouth A's Red Springs Red Robins Tarboro A's Welch Miners |
| 1951 | — | — | Lincoln A's Savannah Indians | Fayetteville A's Salisbury A's | Rome Colonels | Cordele A's Corning A's Lexington Indians |
| 1952 | Ottawa A's | — | Lincoln A's Savannah Indians | Fayetteville A's Harrisburg Senators | St. Hyacinthe A's | Cordele A's Corning A's Lexington Indians |
| 1953 | Ottawa A's | — | Savannah Indians Williamsport A's | Fayetteville Highlanders | St. Hyacinthe A's | Cordele A's Hopkinsville Hoppers Welch Miners |
| 1954 | Ottawa A's | — | Savannah A's | Lancaster Red Roses | Drummondville A's | Hopkinsville Hoppers Welch Miners |
| 1955 | Columbus Jets | — | Savannah A's | Lancaster Red Roses | Burlington A's Hot Springs Bathers | Welch Miners / Marion A's Seminole Oilers |
| 1956 | Columbus Jets | — | Columbia Gems | Abilene Blue Sox | Crowley Millers Pocatello Bannocks | Fitzgerald A's Grand Island A's Seminole Oilers |
| 1957 | Buffalo Bisons | Little Rock Travelers | Columbia Gems | Abilene Blue Sox | Crowley Millers Pocatello A's | Grand Island A's Mattoon Athletics Seminole Oilers |
| 1958 | Buffalo Bisons | Little Rock Travelers | Albany Senators | Rochester A's / Winona A's | Pocatello A's | Grand Island A's Plainview A's Selma Cloverleafs |
| 1959 | Portland Beavers | Shreveport Sports | Albany Senators | Sioux City Soos | Pocatello A's | Grand Island A's Olean A's Plainview A's |
| 1960 | Dallas-Fort Worth Rangers | Shreveport Sports | — | Lewiston Broncs Sioux City Soos | Visalia A's | Albuquerque Dukes Sanford Greyhounds |
| 1961 | Hawaii Islanders | Shreveport Sports | Portsmouth-Norfolk Tides | Lewiston Broncs | Pocatello Bannocks Visalia A's | Albuquerque Dukes Sarasota Sun Sox |
| 1962 | Portland Beavers | Albuquerque Dukes | Binghamton Triplets | Lewiston Broncs | Minot Mallards | Daytona Beach Islanders |

### 1963–1989

Prior to the 1963 season, Major League Baseball (MLB) initiated a reorganization of Minor League Baseball that resulted in a reduction from six classes to four (Triple-A, Double-A, Class A, and Rookie) in 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.
| Season | Triple-A | Double-A | Class A | Class A Short Season | Rookie |
| 1963 | Portland Beavers | Binghamton Triplets | Burlington Bees Daytona Beach Islanders Lewiston Broncs | — | — |
| 1964 | Dallas Rangers | Birmingham Barons | Burlington Bees Daytona Beach Islanders Lewiston Broncs | — | Wytheville A's |
| 1965 | Vancouver Mounties | Birmingham Barons | Burlington Bees Leesburg A's Lewiston Broncs Shelby Rebels | — | — |
| 1966 | Vancouver Mounties | Mobile A's | Burlington Bees Leesburg A's Modesto Reds | Lewiston Broncs | — |
| 1967 | Vancouver Mounties | Birmingham A's | Burlington Bees Leesburg A's Peninsula Grays | — | GCL Athletics |
| 1968 | Vancouver Mounties | Birmingham A's | Burlington Bees Leesburg A's Peninsula Grays | — | GCL Athletics |
| 1969 | Iowa Oaks | Birmingham A's | Burlington Bees Lodi Crushers | Tri-City A's | — |
| 1970 | Iowa Oaks | Birmingham A's | Burlington Bees | Coos Bay-North Bend A's | — |
| 1971 | Iowa Oaks | Birmingham A's | Burlington Bees | Coos Bay-North Bend A's | — |
| 1972 | Iowa Oaks | Birmingham A's | Burlington Bees | Coos Bay-North Bend A's | — |
| 1973 | Tucson Toros | Birmingham A's | Burlington Bees | Lewiston Broncs | — |
| 1974 | Tucson Toros | Birmingham A's | Burlington Bees | Lewiston Broncs | — |
| 1975 | Tucson Toros | Birmingham A's | Modesto A's | Boise A's | — |
| 1976 | Tucson Toros | Chattanooga Lookouts | Modesto A's | Boise A's | — |
| 1977 | San Jose Missions | Chattanooga Lookouts | Modesto A's | — | Medicine Hat A's |
| 1978 | Vancouver Canadians | Jersey City A's | Modesto A's | Bend Timber Hawks | — |
| 1979 | Ogden A's | Waterbury A's | Modesto A's | Medford A's | — |
| 1980 | Ogden A's | West Haven Whitecaps | Modesto A's | Medford A's | — |
| 1981 | Tacoma Tigers | West Haven A's | Modesto A's | Medford A's | — |
| 1982 | Tacoma Tigers | West Haven A's | Madison Muskies Modesto A's | Medford A's | Idaho Falls A's |
| 1983 | Tacoma Tigers | Albany A's | Madison Muskies Modesto A's | Medford A's | Idaho Falls A's |
| 1984 | Tacoma Tigers | Albany-Colonie A's | Madison Muskies Modesto A's | Medford A's | Idaho Falls A's |
| 1985 | Tacoma Tigers | Huntsville Stars | Madison Muskies Modesto A's | Medford A's | Pocatello Gems |
| 1986 | Tacoma Tigers | Huntsville Stars | Madison Muskies Modesto A's | Medford A's | — |
| 1987 | Tacoma Tigers | Huntsville Stars | Madison Muskies Modesto A's | Medford A's | — |
| 1988 | Tacoma Tigers | Huntsville Stars | Madison Muskies Modesto A's | Southern Oregon A's | AZL Athletics |
| 1989 | Tacoma Tigers | Huntsville Stars | Madison Muskies Modesto A's | Southern Oregon A's | AZL Athletics DSL Athletics |

### 1990–2020

Minor League Baseball operated with six classes from 1990 to 2020. In 1990, 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.
| Season | Triple-A | Double-A | Class A-Advanced | Class A | Class A Short Season | Rookie | Foreign Rookie |
| 1990 | Tacoma Tigers | Huntsville Stars | Modesto A's | Madison Muskies | Southern Oregon A's | AZL Athletics | DSL Athletics |
| 1991 | Tacoma Tigers | Huntsville Stars | Modesto A's | Madison Muskies | Southern Oregon A's | AZL Athletics | DSL Athletics |
| 1992 | Tacoma Tigers | Huntsville Stars | Modesto A's | Madison Muskies | Southern Oregon A's | AZL Athletics | DSL Athletics |
| 1993 | Tacoma Tigers | Huntsville Stars | Modesto A's | Madison Muskies | Southern Oregon A's | AZL Athletics | DSL Athletics |
| 1994 | Tacoma Tigers | Huntsville Stars | Modesto A's | West Michigan Whitecaps | Southern Oregon A's | AZL Athletics | DSL Athletics |
| 1995 | Edmonton Trappers | Huntsville Stars | Modesto A's | West Michigan Whitecaps | Southern Oregon A's | AZL Athletics | DSL Athletics |
| 1996 | Edmonton Trappers | Huntsville Stars | Modesto A's | West Michigan Whitecaps | Southern Oregon Timberjacks | AZL Athletics | DSL Athletics |
| 1997 | Edmonton Trappers | Huntsville Stars | Modesto A's Visalia Oaks | — | Southern Oregon Timberjacks | AZL Athletics | DSL Athletics East DSL Athletics West |
| 1998 | Edmonton Trappers | Huntsville Stars | Modesto A's Visalia Oaks | — | Southern Oregon Timberjacks | AZL Athletics | DSL Athletics East DSL Athletics West |
| 1999 | Vancouver Canadians | Midland RockHounds | Modesto A's Visalia Oaks | — | Southern Oregon Timberjacks | AZL Athletics | DSL Athletics East DSL Athletics West |
| 2000 | Sacramento River Cats | Midland RockHounds | Modesto A's Visalia Oaks | — | Vancouver Canadians | AZL Athletics | DSL Athletics East DSL Athletics West |
| 2001 | Sacramento River Cats | Midland RockHounds | Modesto A's Visalia Oaks | — | Vancouver Canadians | AZL Athletics | DSL Athletics East DSL Athletics West |
| 2002 | Sacramento River Cats | Midland RockHounds | Modesto A's Visalia Oaks | — | Vancouver Canadians | AZL Athletics | DSL Athletics East DSL Athletics West |
| 2003 | Sacramento River Cats | Midland RockHounds | Modesto A's | Kane County Cougars | Vancouver Canadians | AZL Athletics | DSL Athletics 1 DSL Athletics 2 |
| 2004 | Sacramento River Cats | Midland RockHounds | Modesto A's | Kane County Cougars | Vancouver Canadians | AZL Athletics | DSL Athletics 1 DSL Athletics 2 |
| 2005 | Sacramento River Cats | Midland RockHounds | Stockton Ports | Kane County Cougars | Vancouver Canadians | AZL Athletics | DSL Athletics 1 DSL Athletics 2 |
| 2006 | Sacramento River Cats | Midland RockHounds | Stockton Ports | Kane County Cougars | Vancouver Canadians | AZL Athletics | DSL Athletics 1 DSL Athletics 2 |
| 2007 | Sacramento River Cats | Midland RockHounds | Stockton Ports | Kane County Cougars | Vancouver Canadians | AZL Athletics | DSL Athletics 1 DSL Athletics 2 |
| 2008 | Sacramento River Cats | Midland RockHounds | Stockton Ports | Kane County Cougars | Vancouver Canadians | AZL Athletics | DSL Athletics 1 DSL Athletics 2 |
| 2009 | Sacramento River Cats | Midland RockHounds | Stockton Ports | Kane County Cougars | Vancouver Canadians | AZL Athletics | DSL Athletics |
| 2010 | Sacramento River Cats | Midland RockHounds | Stockton Ports | Kane County Cougars | Vancouver Canadians | AZL Athletics | DSL Athletics |
| 2011 | Sacramento River Cats | Midland RockHounds | Stockton Ports | Burlington Bees | Vermont Lake Monsters | AZL Athletics | DSL Athletics |
| 2012 | Sacramento River Cats | Midland RockHounds | Stockton Ports | Burlington Bees | Vermont Lake Monsters | AZL Athletics | DSL Athletics |
| 2013 | Sacramento River Cats | Midland RockHounds | Stockton Ports | Beloit Snappers | Vermont Lake Monsters | AZL Athletics | DSL Athletics |
| 2014 | Sacramento River Cats | Midland RockHounds | Stockton Ports | Beloit Snappers | Vermont Lake Monsters | AZL Athletics | DSL Athletics |
| 2015 | Nashville Sounds | Midland RockHounds | Stockton Ports | Beloit Snappers | Vermont Lake Monsters | AZL Athletics | DSL Athletics |
| 2016 | Nashville Sounds | Midland RockHounds | Stockton Ports | Beloit Snappers | Vermont Lake Monsters | AZL Athletics | DSL Athletics |
| 2017 | Nashville Sounds | Midland RockHounds | Stockton Ports | Beloit Snappers | Vermont Lake Monsters | AZL Athletics | DSL Athletics |
| 2018 | Nashville Sounds | Midland RockHounds | Stockton Ports | Beloit Snappers | Vermont Lake Monsters | AZL Athletics | DSL Athletics |
| 2019 | Las Vegas Aviators | Midland RockHounds | Stockton Ports | Beloit Snappers | Vermont Lake Monsters | AZL Athletics Green AZL Athletics Gold | DSL Athletics |
| 2020 | Las Vegas Aviators | Midland RockHounds | Stockton Ports | Beloit Snappers | Vermont Lake Monsters | AZL Athletics Green AZL Athletics Gold | DSL Athletics |

### 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. Low-A was reclassified as Single-A in 2022.
| Season | Triple-A | Double-A | High-A | Single-A | Rookie | Foreign Rookie |
| 2021 | Las Vegas Aviators | Midland RockHounds | Lansing Lugnuts | Stockton Ports | ACL Athletics | DSL Athletics |
| 2022 | Las Vegas Aviators | Midland RockHounds | Lansing Lugnuts | Stockton Ports | ACL Athletics | DSL Athletics |
| 2023 | Las Vegas Aviators | Midland RockHounds | Lansing Lugnuts | Stockton Ports | ACL Athletics | DSL Athletics |
| 2024 | Las Vegas Aviators | Midland RockHounds | Lansing Lugnuts | Stockton Ports | ACL Athletics | DSL Athletics |