Minor League Baseball

Minor League Baseball (MiLB) is a hierarchy of professional baseball minor leagues in the Americas that compete at levels below Major League Baseball (MLB) and help prepare players to join major league teams. Those teams that are affiliated with MLB teams operate under the Commissioner of Baseball within the scope of organized baseball. Several leagues, known as independent baseball leagues, consist of teams with no affiliation to MLB teams.

Starting with the 2021 season, the number of MLB-affiliated minor leagues with teams in the United States and Canada has been reduced to 11, with a total of 120 teams (four per each of the 30 MLB franchises, excluding rookie league teams). There is also an MLB-affiliated rookie league in the Dominican Republic.

Leagues

Defunct

• Eastern League

All MiLB Teams

Active teams

Major League Club	League	Affiliate	City	Current Home Venue
Arizona Diamondbacks	AAA	Reno Aces	Reno, Nevada	Greater Nevada Field (2009-present)
Baltimore Orioles	Double-A Northeast	Bowie Baysox	Bowie, Maryland	Prince George's Stadium (1994-present)
	A	Aberdeen IronBirds	Aberdeen, Maryland	Leidos Field at Ripken Stadium (2002-present)
Chicago Cubs	AAA	Iowa Cubs	Des Moines, Iowa	Principal Park (1992-present)
	A Short Season	Eugene Emeralds	Eugene, Oregon	PK Park (2010-present)
Chicago White Sox	AAA	Charlotte Knights	Charlotte, North Carolina	Truist Field (2014-present)
	AA	Birmingham Barons	Birmingham, Alabama	Regions Field (2013-present)
Cleveland Indians	AAA	Columbus Clippers	Columbus, Ohio	Huntington Park
	Double-A Northeast	Akron RubberDucks	Akron, Ohio	Canal Park (1997-present)
Colorado Rockies	AAA	Albuquerque Isotopes	Albuquerque, New Mexico	Rio Grande Credit Union Field at Isotopes Park (2003-present)
	A	Fresno Grizzlies	Fresno, California	Chukchansi Park (2002-present)
Houston Astros	AAA	Sugar Land Skeeters	Sugar Land, Texas	Constellation Field (2012-present)
	AA	Corpus Christi Hooks	Corpus Christi, Texas	Whataburger Field (2005-present)
Kansas City Royals	AAA	Omaha Storm Chasers	Papillion, Nebraska	Werner Park (2011-present)
Milwaukee Brewers	AAA	Nashville Sounds	Nashville, Tennessee	First Horizon Park (2015-present)
	High-A	Wisconsin Timber Rattlers	Grand Chute, Wisconsin	Neuroscience Group Field at Fox Cities Stadium (1995-present)
New York Yankees	Double-A Northeast	Somerset Patriots	Bridgewater Township, New Jersey	TD Bank Ballpark (1999-present)
Philadelphia Phillies	AAA	Lehigh Valley IronPigs	Allentown, Pennsylvania	Coca-Cola Park (2008-present)
Pittsburgh Pirates	AAA	Indianapolis Indians	Indianapolis, Indiana	Victory Field (1996-present)
San Diego Padres	AA	San Antonio Missions	San Antonio, Texas	Nelson W. Wolff Municipal Stadium (1994-present)
Seattle Mariners	AAA	Tacoma Rainiers	Tacoma, Washington	Cheney Stadium (1960-present)
	AA	Arkansas Travelers	North Little Rock, Arkansas	Dickey-Stephens Park (2007-present)
Tampa Bay Rays	AAA	Durham Bulls	Durham, North Carolina	Durham Bulls Athletic Park (1995-present)
Texas Rangers	AAA	Round Rock Express	Round Rock, Texas	Dell Diamond (2000-present)
	A Short Season	Spokane Indians	Spokane Valley, Washington	Avista Stadium (1958-present)
Toronto Blue Jays	AAA	Buffalo Bisons	Buffalo, New York	Sahlen Field (1988-present)
	Double-A Northeast	New Hampshire Fisher Cats	Manchester, New Hampshire	Northeast Delta Dental Stadium (2005-present)
Washington Nationals	AAA	Rochester Red Wings	Rochester, New York	Frontier Field (1997-present)
	High-A East	Wilmington Blue Rocks	Wilmington, Delaware	Daniel S. Frawley Stadium (1993-present)

Defunct teams

Team	Years Active	Level	City	Last Venue
Calgary Cannons	1985-2002	AAA	Calgary, Alberta	Foothills Stadium (1985-2002)
Toronto Maple Leafs	1896-1967	AAA	Toronto, Ontario	Maple Leaf Stadium (1926-67)

See also

List of Minor League Baseball stadiums

Leagues Portal