AAA leagues are the highest level of minor league, just below the major leagues.
Leagues and classifications (for the 2004 season)
AAA (triple-A) leagues
AA (double-A) leagues
High-A leagues
Low-A leagues
Short-Season A leagues
Rookie/Instructional leagues
Fall leagues
Independent minor leagues (not affiliated with Major League Baseball)
ALPHABETICAL TEAM LISTING
| Team | Classification | League | Affiilation |
| A | |||
| Abbotsford Saints | A | Canadian Baseball League | Independent |
| Aberdeen Ironbirds | A | NYPL | Baltimore Orioles |
| Akron Aeros | AA | Eastern League | Cleveland Indians |
| Albuquerque Isotopes | AAA | PCL | Florida Marlins |
| Alexandria Aces | A | Central Baseball League | Independent |
| Allentown Ambassadors | A | Northeast League | Independent |
| Altoona Curve | AA | Eastern League | Pittsburgh Pirates |
| Amarillo Dillas | A | Central Baseball League | Independent |
| Atlantic City Surf | A | Atlantic League | Independent |
| Arizona Brewers | R | Arizona League | Milwaukee Brewers |
| Arizona Padres | R | Arizona League | San Diego Padres |
| Arkansas Travelers | AA | Texas League | Anaheim Angels |
| Asheville Tourists | A | South Atlantic League | Colorado Rockies |
| Auburn Doubledays | A | NYPL | Toronto Blue Jays |
| Augusta GreenJackets | A | South Atlantic League | Boston Red Sox |
| B | |||
| Bakersfield Blaze | A | California League | Tampa Bay Devil Rays |
| Bangor Lumberjacks | A | Northeast League | Independent |
| Baseball City Royals | R | Gulf Coast League | Kansas City Royals |
| Batavia Muckdogs | A | NYPL | Philadelphia Phillies |
| Baton Rouge RiverBats | A | Southeastern League | Independent |
| Battle Creek Yankees | A | Midwest League | New York Yankees |
| Beloit Snappers | A | Midwest League | Milwaukee Brewers |
| Berkshire Black Bears | A | Northeast League | Independent |
| Billings Mustangs | R | Pioneer League | Cincinnati Reds |
| Binghamton Mets | AA | Eastern League | New York Mets |
| Birmingham Barons | AA | Southern League | Chicago White Sox |
| Bluefield Orioles | R | Appalachian League | Baltimore Orioles |
| Boise Hawks | A | Northwest League | Chicago Cubs |
| Bowie Baysox | AA | Eastern League | Baltimore Orioles |
| Bradenton Pirates | R | Gulf Coast League | Pittsburgh Pirates |
| Brevard County Manatees | A | Florida State League | Montreal Expos |
| Bridgeport Bluefish | A | Atlantic League | Independent |
| Bristol White Sox | R | Appalachian League | Chicago White Sox |
| Brockton Rox | A | Northeast League | Independent |
| Brooklyn Cyclones | A | NYPL | New York Mets |
| Buffalo Bisons | AAA | IL | Cleveland Indians |
| Burlington Bees | A | Midwest League | Kansas City Royals |
| Burlington Indians | R | Appalachian League | Cleveland Indians |
| C | |||
| Camden Riversharks | A | Atlantic League | Independent |
| Campeche Piratas | AAA | ML | Independent |
| Cancun Langosteros | AAA | ML | Independent |
| Capital City Bombers | A | South Atlantic League | New York Mets |
| Carolina Mudcats | AA | Southern League | Florida Marlins |
| Casper Rockies | R | Appalachian League | Colorado Rockies |
| Cedar Rapids Kernels | A | Midwest League | Anaheim Angels |
| Charleston Alley Cats | A | South Atlantic League | Toronto Blue Jays |
| Charleston RiverDogs | A | South Atlantic League | Tampa Bay Devil Rays |
| Charlotte Cardinals | A | Florida State League | St. Louis Cardinals |
| Charlotte Knights | AAA | IL | Chicago White Sox |
| Chattanooga Lookouts | AA | Southern League | Cincinnati Reds |
| Chillicothe Paints | A | Frontier League | Independent |
| Clearwater Phillies | A | Florida State League | Philadelphia Phillies |
| Clearwater Phillies | R | Gulf Coast League | Philadelphia Phillies |
| Clinton LumberKings | A | Midwest League | Texas Rangers |
| Coastal Bend Aviators | A | Central Baseball League | Independent |
| Colorado Springs Sky Sox | AAA | PCL | Colorado Rockies |
| Columbus Clippers | AAA | IL | New York Yankees |
| Cook County Cheetahs | A | Frontier League | Independent |
| Cordoba Cafeteros | AAA | ML | Independent |
| D | |||
| Danville Braves | R | Appalachian League | Atlanta Braves |
| Dayton Dragons | A | Midwest League | Cincinnati Reds |
| Daytona Cubs | A | Florida State League | Chicago Cubs |
| Delmarva Shorebirds | A | South Atlantic League | Baltimore Orioles |
| Dos Laredos Tecolotes | AAA | ML | Independent |
| Dunedin Blue Jays | A | Florida State League | Toronto Blue Jays |
| Durham Bulls | AAA | IL | Tampa Bay Devil Rays |
| E | |||
| Edinburg Roadrunners | A | Central Baseball League | Independent |
| Edmonton Trappers | AAA | PCL | Montreal Expos |
| El Paso Diablos | AA | Texas League | Arizona Diamondbacks |
| Elizabethton Twins | R | Appalachian League | Minnesota Twins |
| Elmira Pioneers | A | Northeast League | Independent |
| Erie SeaWolves | AA | Eastern League | Detroit Tigers |
| Eugene Emeralds | A | Northwest League | San Diego Padres |
| Evansville Otters | A | Frontier League | Independent |
| Everett AquaSox | A | Northwest League | Seattle Mariners |
| F | |||
| Fargo-Moorhead Redhawks | A | Northern League | Independent |
| Florence Freedom | A | Frontier League | Independent |
| Fort Myers Miracle | A | Florida State League | Minnesota Twins |
| Fort Myers Red Sox | R | Gulf Coast League | Boston Red Sox |
| Fort Myers Twins | R | Gulf Coast League | Minnesota Twins |
| Fort Wayne Wizards | A | Midwest League | San Diego Padres |
| Fort Worth Cats | A | Central Baseball League | Independent |
| Frederick Keys | A | Carolina League | Baltimore Orioles |
| Fresno Grizzlies | AAA | PCL | San Francisco Giants |
| Frisco RoughRiders | AA | Texas League | Texas Rangers |
| G | |||
| Gary SouthShore Railcats | A | Northern League | Independent |
| Gateway Grizzlies | A | Frontier League | Independent |
| Grand Canyon Rafters | A | Arizona Fall League | Independent |
| Great Falls White Sox | R | Pioneer League | Chicago White Sox |
| Greensboro Bats | A | South Atlantic League | Florida Marlins |
| Greenville Braves | AA | Southern League | Atlanta Braves |
| H | |||
| Hagerstown Suns | A | South Atlantic League | San Francisco Giants |
| Harrisburg Senators | AA | Eastern League | Montreal Expos |
| Helena Brewers | R | Pioneer League | Milwaukee Brewers |
| Hickory Crawdads | A | South Atlantic League | Pittsburgh Pirates |
| High Desert Mavericks | A | California League | Milwaukee Brewers |
| Houma Hawks | A | Southeastern League | Independent |
| Hudson Valley Renegades | A | NYPL | Tampa Bay Devil Rays |
| Huntsville Stars | AA | Southern League | Milwaukee Brewers |
| I | |||
| Idaho Falls Chukars | R | Pioneer League | Kansas City Royals |
| Indianapolis Indians | AAA | IL | Milwaukee Brewers |
| Inland Empire 66ers | A | California League | Seattle Mariners |
| Iowa Cubs | AAA | PCL | Chicago Cubs |
| J | |||
| Jackson Senators | A | Central Baseball League | Independent |
| Jacksonville Suns | AA | Southern League | Los Angeles Dodgers |
| Jamestown Jammers | A | NYPL | Florida Marlins |
| Johnson City Cardinals | R | Appalachian League | St Louis Cardinals |
| Joliet JackHammers | A | Northern League | Independent |
| Jupiter Hammerheads | A | Florida State League | Florida Marlins |
| Jupiter Marlins | R | Gulf Coast League | Florida Marlins |
| K | |||
| Kamloops Critters | A | Canadian Baseball League | Independent |
| Kalamazoo Kings | A | Frontier League | Independent |
| Kane County Cougars | A | Midwest League | Oakland Athletics |
| Kannapolis Intimidators | A | South Atlantic League | Chicago White Sox |
| Kansas City T-Bones | A | Northern League | Independent |
| Kelowna Heat | A | Canadian Baseball League | Independent |
| Kenosha Mammoths | A | Frontier League | Independent |
| Kingsport Mets | R | Appalachian League | New York Mets |
| Kinston Indians | A | Carolina League | Cleveland Indians |
| L | |||
| Lake County Captains | A | South Atlantic League | Cleveland Indians |
| Lake Elsinore Storm | A | California League | San Diego Padres |
| Lakeland Tigers | A | Florida State League | Detroit Tigers |
| Lakeland Tigers | R | Gulf Coast League | Detroit Tigers |
| Lakewood BlueClaws | A | South Atlantic League | Philadelphia Phillies |
| Lancaster JetHawks | A | California League | Arizona Diamondbacks |
| Lansing Lugnuts | A | Midwest League | Chicago Cubs |
| Las Vegas 51s | AAA | PCL | Los Angeles Dodgers |
| Lethbridge Dust Devils | A | Canadian Baseball League | Independent |
| Lexington Legends | A | South Atlantic League | Houston Astros |
| Lincoln Saltdogs | A | Northern League | Independent |
| Long Island Ducks | A | Atlantic League | Independent |
| Louisville Bats | AAA | IL | Cincinnati Reds |
| Lowell Spinners | A | NYPL | Boston Red Sox |
| Lynchburg Hillcats | A | Carolina League | Pittsburgh Pirates |
| M | |||
| Macon Peaches | A | Southeastern League | Independent |
| Mahoning Valley Scrappers | A | NYPL | Cleveland Indians |
| Martinsville Astros | R | Appalachian League | Houston Astros |
| Maryvale Saguaros | A | Arizona Fall League | Independent |
| Melbourne Expos | R | Gulf Coast League | Montreal Expos |
| Memphis Redbirds | AAA | PCL | St. Louis Cardinals |
| Mesa Cubs | R | Arizona League | Chicago Cubs |
| Mesa Angels | R | Arizona League | Anaheim Angels |
| Mesa Solar Sox | A | Arizona Fall League | Independent |
| Mexico Tigres | AAA | ML | Independent |
| Mexico City Diablos Rojos | AAA | ML | Independent |
| Mid-Missouri Mavericks | A | Frontier League | Independent |
| Midland RockHounds | AA | Texas League | Oakland Athletics |
| Missoula Osprey | R | Pioneer League | Arizona Diamondbacks |
| Mobile BayBears | AA | Southern League | San Diego Padres |
| Modesto A's | A | California League | Oakland Athletics |
| Monclova Acereros | AAA | ML | Independent |
| Monterrey Sultanes | AAA | ML | Independent |
| Montgomery Biscuits | AA | Southern League | Tampa Bay Devil Rays |
| Montgomery Wings | A | Southeastern League | Independent |
| Myrtle Beach Pelicans | A | Carolina League | Atlanta Braves |
| N | |||
| Nanaimo Navigators | A | Canadian Baseball League | Independent |
| Nashua Pride | A | Atlantic League | Independent |
| Nashville Sounds | AAA | PCL | Pittsburgh Pirates |
| New Britain Rock Cats | AA | Eastern League | Minnesota Twins |
| New Hampshire Fisher Cats | AA | Eastern League | Toronto Blue Jays |
| New Jersey Cardinals | A | NYPL | St. Louis Cardinals |
| New Jersey Jackals | A | Northeast League | Independent |
| New Orleans Zephyrs | AAA | PCL | Houston Astros |
| Newark Bears | A | Atlantic League | Independent |
| Norfolk Tides | AAA | IL | New York Mets |
| North Shore Spirit | A | Northeast League | Independent |
| Norwich Navigators | AA | Eastern League | San Francisco Giants |
| O | |||
| Oaxaca Guerreros | AAA | ML | Independent |
| Ogden Raptors | R | Pioneer League | Los Angeles Dodgers |
| Oklahoma RedHawks | AAA | PCL | Texas Rangers |
| Omaha Royals | AAA | PCL | Kansas City Royals |
| Oneonta Tigers | A | NYPL | Detroit Tigers |
| Orlando Braves | R | Gulf Coast League | Atlanta Braves |
| Ottawa Lynx | AAA | IL | Baltimore Orioles |
| P | |||
| Pawtucket Red Sox | AAA | IL | Boston Red Sox |
| Pensacola Pelicans | A | Southeastern League | Independent |
| Peoria Chiefs | A | Midwest League | St. Louis Cardinals |
| Peoria Javelinas | A | Arizona Fall League | Independent |
| Peoria Mariners | R | Arizona League | Seattle Mariners |
| Phoenix Athletics | R | Arizona League | Oakland Athletics |
| Phoenix Desert Dogs | A | Arizona Fall League | Independent |
| Phoenix White Sox | R | Arizona League | Chicago White Sox |
| Port Charlotte Rangers | R | Gulf Coast League | Texas Rangers |
| Portland Beavers | AAA | PCL | San Diego Padres |
| Portland Sea Dogs | AA | Eastern League | Boston Red Sox |
| Potomac Cannons | A | Carolina League | Cincinnati Reds |
| Princeton Devil Rays | R | Appalachian League | Tampa Bay Devil Rays |
| Provo Angels | A | Pioneer League | Anaheim Angels |
| Puebla Pericos | AAA | ML | Independent |
| Pulaski Blue Jays | R | Appalachian League | Toronto Blue Jays |
| Q | |||
| Swing of the Quad Cities | A | Midwest League | Minnesota Twins |
| Les Capitales de Québec | A | Northeast League | Independent |
| R | |||
| Rancho Cucamonga Quakes | A | California League | Anaheim Angels |
| Reading Phillies | AA | Eastern League | Philadelphia Phillies |
| Red Deer Outlaws | A | Canadian Baseball League | Independent |
| Regina Storm | A | Canadian Baseball League | Independent |
| Reynosa Broncos | AAA | ML | Independent |
| Richmond Braves | AAA | IL | Atlanta Braves |
| Richmond Roosters | A | Frontier League | Independent |
| Rio Grande Valley White Wings | A | Central Baseball League | Independent |
| River City Rascals | A | Frontier League | Independent |
| Rochester Red Wings | AAA | IL | Minnesota Twins |
| Rockford RiverHawks | A | Frontier League | Independent |
| Rome Braves | A | South Atlantic League | Atlanta Braves |
| Round Rock Express | AA | Texas League | Houston Astros |
| S | |||
| Sacramento River Cats | AAA | PCL | Oakland Athletics |
| Salem Avalanche | A | Carolina League | Houston Astros |
| Salem-Keizer Volcanoes | A | Northwest League | San Francisco Giants |
| Salt Lake Stingers | AAA | PCL | Anaheim Angels |
| Saltillo Saraperos | AAA | ML | Independent |
| San Angelo Colts | A | Central Baseball League | Independent |
| San Antonio Missions | AA | Texas League | Seattle Mariners |
| San Jose Giants | A | California League | San Francisco Giants |
| Sarasota Red Sox | A | Florida State League | Boston Red Sox |
| Sarasota Reds | R | Gulf Coast League | Cincinnati Reds |
| Sarasota Orioles | R | Gulf Coast League | Baltimore Orioles |
| Saskatoon Yellow Jackets | A | Canadian Baseball League | Independent |
| Savannah Sand Gnats | A | South Atlantic League | Montreal Expos |
| Schaumburg Flyers | A | Northern League | Independent |
| Scottsdale Giants | R | Arizona League | San Francisco Giants |
| Scottsdale Scorpions | A | Arizona Fall League | Independent |
| Scranton/Wilkes-Barre Red Barons | AAA | IL | Philadelphia Phillies |
| Selma Cloverleafs | A | Southeastern League | Independent |
| Shreveport Sports | A | Central Baseball League | Independent |
| Sioux City Explorers | A | Northern League | Independent |
| Sioux Falls Canaries | A | Northern League | Independent |
| Somerset Patriots | A | Atlantic League | Independent |
| South Bend Silver Hawks | A | Midwest League | Arizona Diamondbacks |
| South Georgia Waves | A | South Atlantic League | Los Angeles Dodgers |
| Spokane Indians | A | Northwest League | Texas Rangers |
| Springfield Ozark Mountain Ducks | A | Central Baseball League | Independent |
| St. Lucie Mets | A | Florida State League | New York Mets |
| St. Paul Saints | A | Northern League | Independent |
| Staten Island Yankees | A | NYPL | New York Yankees |
| Stockton Ports | A | California League | Texas Rangers |
| Syracuse SkyChiefs | AAA | IL | Toronto Blue Jays |
| T | |||
| Tabasco Olmecas | AAA | ML | Independent |
| Tacoma Rainiers | AAA | PCL | Seattle Mariners |
| Tampa Yankees | A | Florida State League | New York Yankees |
| Tampa Yankees | R | Gulf Coast League | New York Yankees |
| Tennessee Smokies | AA | Southern League | St. Louis Cardinals |
| Toledo Mud Hens | AAA | IL | Detroit Tigers |
| Trenton Thunder | AA | Eastern League | New York Yankees |
| Tri-City Dust Devils | A | Northwest League | Colorado Rockies |
| Tri-City Valley Cats | A | NYPL | Houston Astros |
| Tucson Sidewinders | AAA | PCL | Arizona Diamondbacks |
| Tulsa Drillers | AA | Texas League | Colorado Rockies |
| U | |||
| Union Laguna Algdoneros | AAA | ML | Independent |
| V | |||
| Vancouver Canadians | A | Northwest League | Oakland Athletics |
| Veracruz Rojos del Aguila | AAA | ML | Independent |
| Vermont Expos | A | NYPL | Montreal Expos |
| Vero Beach Dodgers | A | Florida State League | Los Angeles Dodgers |
| Vero Beach Dodgers | R | Gulf Coast League | Los Angeles Dodgers |
| Visalia Oaks | A | California League | Colorado Rockies |
| W | |||
| Washington Wild Things | A | Frontier League | Independent |
| West Michigan Whitecaps | A | Midwest League | Detroit Tigers |
| West Tenn Diamond Jaxx | AA | Southern League | Chicago Cubs |
| Wichita Wranglers | AA | Texas League | Kansas City Royals |
| Williamsport Crosscutters | A | NYPL | Pittsburgh Pirates |
| Wilmington Blue Rocks | A | Carolina League | Kansas City Royals |
| Winnipeg Goldeyes | A | Northern League | Independent |
| Winston-Salem Warthogs | A | Carolina League | Chicago White Sox |
| Wisconsin Timber Rattlers | A | Midwest League | Seattle Mariners |
| Y | |||
| Yakima Bears | A | Northwest League | Arizona Diamondbacks |
| Yucatan Leones | AAA | ML | Independent |
See also: List of defunct sports leagues