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
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
See also
List of Minor League Baseball stadiums
Leagues Portal
