There are 14 Minor League Baseball (MiLB) leagues and 202 teams in operation across the United States, Dominican Republic, and Canada, which are affiliated with Major League Baseball (MLB) teams. They are organized by one of five classes (from highest to lowest): Triple-A, Double-A, High-A, Single-A, and Rookie. Of these, 120 teams in 11 leagues (from Triple-A to Single-A) are each affiliated with one MLB team through a standardized professional development license. Additionally, three leagues consisting of a total of 82 Rookie teams are located at MLB spring training complexes in Arizona and Florida, as well as in the Dominican Republic. These affiliated leagues contest their seasons during the MLB season.
The Arizona Fall League, consisting of six teams, operates in the autumn after the conclusion of the MiLB and MLB seasons to develop top prospects at various classifications.
Seven independent baseball leagues, consisting of a total of 69 teams, have no direct affiliation with Major League Baseball, though the American Association, Atlantic League, Frontier League, and Pioneer League are designated MLB Partner Leagues.
Leagues affiliated with Major League Baseball
Triple-A leagues
The Triple-A classification is the highest level of play in MiLB, just below MLB. A total of 30 affiliated teams compete at this level, with 20 teams in the International League and 10 teams in the Pacific Coast League.
International League
{| class="wikitable sortable"
|+Overview of International League teams
|-
!scope="col"|Team
!scope="col"|Division
!scope="col"|City
!scope="col"|State
!scope="col"|Stadium
!scope="col"|Capacity
!scope="col"|Affiliate
|-
!scope="row" style="text-align:left"|Buffalo Bisons
|East
|Buffalo
|New York
|Sahlen Field
|16,600
|Toronto Blue Jays
|-
!scope="row" style="text-align:left"|Charlotte Knights
|East
|Charlotte
|North Carolina
|Truist Field
|10,200
|Chicago White Sox
|-
!scope="row" style="text-align:left"|Columbus Clippers
|West
|Columbus
|Ohio
|Huntington Park
|10,100
|Cleveland Guardians
|-
!scope="row" style="text-align:left"|Durham Bulls
|East
|Durham
|North Carolina
|Durham Bulls Athletic Park
|10,000
|Tampa Bay Rays
|-
!scope="row" style="text-align:left"|Gwinnett Stripers
|West
|Lawrenceville
|Georgia
|Gwinnett Field
|10,427
|Atlanta Braves
|-
!scope="row" style="text-align:left"|Indianapolis Indians
|West
|Indianapolis
|Indiana
|Victory Field
|14,230
|Pittsburgh Pirates
|-
!scope="row" style="text-align:left"|Iowa Cubs
|West
|Des Moines
|Iowa
|Principal Park
|11,500
|Chicago Cubs
|-
!scope="row" style="text-align:left"|Jacksonville Jumbo Shrimp
|East
|Jacksonville
|Florida
|VyStar Ballpark
|11,000
|Miami Marlins
|-
!scope="row" style="text-align:left"|Lehigh Valley IronPigs
|East
|Allentown
|Pennsylvania
|Coca-Cola Park
|10,100
|Philadelphia Phillies
|-
!scope="row" style="text-align:left"|Louisville Bats
|West
|Louisville
|Kentucky
|Louisville Slugger Field
|13,131
|Cincinnati Reds
|-
!scope="row" style="text-align:left"|Memphis Redbirds
|West
|Memphis
|Tennessee
|AutoZone Park
|10,000
|St. Louis Cardinals
|-
!scope="row" style="text-align:left"|Nashville Sounds
|West
|Nashville
|Tennessee
|First Horizon Park
|10,000
|Milwaukee Brewers
|-
!scope="row" style="text-align:left"|Norfolk Tides
|East
|Norfolk
|Virginia
|Harbor Park
|11,856
|Baltimore Orioles
|-
!scope="row" style="text-align:left"|Omaha Storm Chasers
|West
|Papillion
|Nebraska
|Werner Park
|9,023
|Kansas City Royals
|-
!scope="row" style="text-align:left"|Rochester Red Wings
|East
|Rochester
|New York
|ESL Ballpark
|10,840
|Washington Nationals
|-
!scope="row" style="text-align:left"|Scranton/Wilkes-Barre RailRiders
|East
|Moosic
|Pennsylvania
|PNC Field
|10,000
|New York Yankees
|-
!scope="row" style="text-align:left"|St. Paul Saints
|West
|Saint Paul
|Minnesota
|CHS Field
|7,210
|Minnesota Twins
|-
!scope="row" style="text-align:left"|Syracuse Mets
|East
|Syracuse
|New York
|NBT Bank Stadium
|11,731
|New York Mets
|-
!scope="row" style="text-align:left"|Toledo Mud Hens
|West
|Toledo
|Ohio
|Fifth Third Field
|10,300
|Detroit Tigers
|-
!scope="row" style="text-align:left"|Worcester Red Sox
|East
|Worcester
|Massachusetts
|Polar Park
|9,508
|Boston Red Sox
|}
Pacific Coast League
{| class="wikitable sortable"
|+Overview of Pacific Coast League teams
|-
!scope="col"|Team
!scope="col"|Division
!scope="col"|City
!scope="col"|State
!scope="col"|Stadium
!scope="col"|Capacity
!scope="col"|Affiliate
|-
!scope="row" style="text-align:left"|Albuquerque Isotopes
|East
|Albuquerque
|New Mexico
|Rio Grande Credit Union Field at Isotopes Park
|13,500
|Colorado Rockies
|-
!scope="row" style="text-align:left"|El Paso Chihuahuas
|East
|El Paso
|Texas
|Southwest University Park
|9,500
|San Diego Padres
|-
!scope="row" style="text-align:left"|Las Vegas Aviators
|West
|Las Vegas
|Nevada
|Las Vegas Ballpark
|10,000
|Athletics
|-
!scope="row" style="text-align:left"|Oklahoma City Comets
|East
|Oklahoma City
|Oklahoma
|Chickasaw Bricktown Ballpark
|9,000
|Los Angeles Dodgers
|-
!scope="row" style="text-align:left"|Reno Aces
|West
|Reno
|Nevada
|Greater Nevada Field
|9,013
|Arizona Diamondbacks
|-
!scope="row" style="text-align:left"|Round Rock Express
|East
|Round Rock
|Texas
|Dell Diamond
|11,631
|Texas Rangers
|-
!scope="row" style="text-align:left"|Sacramento River Cats
|West
|West Sacramento
|California
|Sutter Health Park
|14,014
|San Francisco Giants
|-
!scope="row" style="text-align:left"|Salt Lake Bees
|West
|South Jordan
|Utah
|Ballpark at America First Square
|8,500
|Los Angeles Angels
|-
!scope="row" style="text-align:left"|Sugar Land Space Cowboys
|East
|Sugar Land
|Texas
|Constellation Field
|7,500
|Houston Astros
|-
!scope="row" style="text-align:left"|Tacoma Rainiers
|West
|Tacoma
|Washington
|Cheney Stadium
|6,500
|Seattle Mariners
|}
Double-A leagues
The Double-A classification is the second-highest level of play in Minor League Baseball. A total of 30 teams compete at this level, with 12 teams in the Eastern League, 8 teams in the Southern League, and 10 teams in the Texas League. 20 teams in the Florida Complex League, and 47 teams in the Dominican Summer League.
Arizona Complex League
{| class="wikitable sortable"
|+Overview of Arizona Complex League teams
|-
!scope="col"|Team
!scope="col"|City (all in Arizona)
!scope="col"|Stadium
!scope="col"|Affiliate
|-
!scope="row" style="text-align:left"|ACL Angels
|Tempe
|Tempe Diablo Stadium
|Los Angeles Angels
|-
!scope="row" style="text-align:left"|ACL Athletics
|Mesa
|Fitch Park
|Athletics
|-
!scope="row" style="text-align:left"|ACL Brewers
|Phoenix
|American Family Fields of Phoenix
|Milwaukee Brewers
|-
!scope="row" style="text-align:left"|ACL Cubs
|Mesa
|Sloan Park
|Chicago Cubs
|-
!scope="row" style="text-align:left"|ACL D-backs
|Scottsdale
|Salt River Fields at Talking Stick
|Arizona Diamondbacks
|-
!scope="row" style="text-align:left"|ACL Dodgers
|Glendale
|Camelback Ranch
|Los Angeles Dodgers
|-
!scope="row" style="text-align:left"|ACL Giants
|Scottsdale
|Scottsdale Stadium
|San Francisco Giants
|-
!scope="row" style="text-align:left"|ACL Guardians
|Goodyear
|Goodyear Ballpark
|Cleveland Guardians
|-
!scope="row" style="text-align:left"|ACL Mariners
|Peoria
|Peoria Sports Complex
|Seattle Mariners
|-
!scope="row" style="text-align:left"|ACL Padres
|Peoria
|Peoria Sports Complex
|San Diego Padres
|-
!scope="row" style="text-align:left"|ACL Rangers
|Surprise
|Surprise Stadium
|Texas Rangers
|-
!scope="row" style="text-align:left"|ACL Reds
|Goodyear
|Goodyear Ballpark
|Cincinnati Reds
|-
!scope="row" style="text-align:left"|ACL Rockies
|Scottsdale
|Salt River Fields at Talking Stick
|Colorado Rockies
|-
!scope="row" style="text-align:left"|ACL Royals
|Surprise
|Surprise Stadium
|Kansas City Royals
|-
!scope="row" style="text-align:left"|ACL White Sox
|Glendale
|Camelback Ranch
|Chicago White Sox
|}
Florida Complex League
{| class="wikitable sortable"
|+Overview of Florida Complex League teams
|-
!scope="col"|Team
!scope="col"|City (all in Florida)
!scope="col"|Stadium
!scope="col"|Affiliate
|-
!scope="row" style="text-align:left"|FCL Astros
|West Palm Beach
|Cacti Park of the Palm Beaches
|Houston Astros
|-
|-
!scope="row" style="text-align:left"|FCL Blue Jays
|Dunedin
|Bobby Mattick Training Center
|Toronto Blue Jays
|-
!scope="row" style="text-align:left"|FCL Braves
|North Port
|CoolToday Park
|Atlanta Braves
|-
!scope="row" style="text-align:left"|FCL Cardinals
|Jupiter
|Roger Dean Chevrolet Stadium
|St. Louis Cardinals
|-
!scope="row" style="text-align:left"|FCL Marlins
|Jupiter
|Roger Dean Chevrolet Stadium
|Miami Marlins
|-
!scope="row" style="text-align:left"|FCL Mets
|Port St. Lucie
|Clover Park
|New York Mets
|-
!scope="row" style="text-align:left"|FCL Nationals
|West Palm Beach
|Cacti Park of the Palm Beaches
|Washington Nationals
|-
!scope="row" style="text-align:left"|FCL Orioles
|Sarasota
|Ed Smith Stadium
|Baltimore Orioles
|-
!scope="row" style="text-align:left"|FCL Phillies
|Clearwater
|Carpenter Complex
|Philadelphia Phillies
|-
!scope="row" style="text-align:left"|FCL Pirates
|Bradenton
|Pirate City
|Pittsburgh Pirates
|-
!scope="row" style="text-align:left"|FCL Rays
|Port Charlotte
|Charlotte Sports Park
|Tampa Bay Rays
|-
!scope="row" style="text-align:left"|FCL Red Sox
|Fort Myers
|JetBlue Park at Fenway South
|Boston Red Sox
|-
!scope="row" style="text-align:left"|FCL Tigers
|Lakeland
|Tigertown
|Detroit Tigers
|-
!scope="row" style="text-align:left"|FCL Twins
|Fort Myers
|Lee County Sports Complex
|Minnesota Twins
|-
!scope="row" style="text-align:left"|FCL Yankees
|Tampa
|Himes Complex
|New York Yankees
|}
Dominican Summer League
{| class="wikitable sortable"
|+Overview of Dominican Summer League teams
|-
!scope="col"|Team
!scope="col"|Division
!scope="col"|City
!scope="col"|Province
!scope="col"|Stadium
!scope="col"|Affiliate
|-
!scope="row" style="text-align:left"|DSL Angels
|Boca Chica South
|San Pedro de Macorís
|San Pedro de Macorís
|Baseball Valley Complex
|Los Angeles Angels
|-
!scope="row" style="text-align:left"|DSL Astros
|Boca Chica Northwest
|San Antonio de Guerra
|Santo Domingo
|Houston Astros Complex
|Houston Astros
|-
!scope="row" style="text-align:left"|DSL Athletics
|Boca Chica Northwest
|Santo Domingo Norte
|Santo Domingo
|Juan Marichal Complex
|Oakland Athletics
|-
!scope="row" style="text-align:left"|DSL Blue Jays
|Boca Chica Baseball City
|San Pedro de Macorís
|San Pedro de Macorís
|Baseball City Complex
|Toronto Blue Jays
|-
!scope="row" style="text-align:left"|DSL Braves
|Boca Chica Northwest
|San Pedro de Macorís
|San Pedro de Macorís
|Corcova de Guerra Complex
|Atlanta Braves
|-
!scope="row" style="text-align:left"|DSL Brewers Blue
|Boca Chica San Pedro de Macorís
|Santo Domingo Este
|Santo Domingo
|Dominican Republic Academy
|Milwaukee Brewers
|-
!scope="row" style="text-align:left"|DSL Brewers Gold
|Boca Chica San Pedro de Macorís
|Santo Domingo Este
|Santo Domingo
|Dominican Republic Academy
|Milwaukee Brewers
|-
!scope="row" style="text-align:left"|DSL Cardinals Blue
|Boca Chica South
|Santo Domingo Norte
|Santo Domingo
|Baseball Oasis Complex
|St. Louis Cardinals
|-
!scope="row" style="text-align:left"|DSL Cardinals Red
|Boca Chica San Pedro de Macorís
|Santo Domingo Norte
|Santo Domingo
|Baseball Oasis Complex
|St. Louis Cardinals
|-
!scope="row" style="text-align:left"|DSL Rockies
|Boca Chica Northeast
|Boca Chica
|Santo Domingo
|Colorado Rockies Complex
|Colorado Rockies
|-
!scope="row" style="text-align:left"|DSL Cubs Blue
|Boca Chica North
|Boca Chica
|Santo Domingo
|Chicago Cubs Complex
|Chicago Cubs
|-
!scope="row" style="text-align:left"|DSL Cubs Red
|Boca Chica San Pedro de Macorís
|Boca Chica
|Santo Domingo
|Chicago Cubs Complex
|Chicago Cubs
|-
!scope="row" style="text-align:left"|DSL Diamondbacks 1
|Boca Chica Baseball City
|Boca Chica
|Santo Domingo
|Baseball City Complex
|Arizona Diamondbacks
|-
!scope="row" style="text-align:left"|DSL Diamondbacks 2
|Boca Chica San Pedro de Macorís
|Boca Chica
|Santo Domingo
|Baseball City Complex
|Arizona Diamondbacks
|-
!scope="row" style="text-align:left"|DSL Dodgers Bautista
|Boca Chica Northwest
|San Antonio de Guerra
|Santo Domingo
|Las Américas Complex
|Los Angeles Dodgers
|-
!scope="row" style="text-align:left"|DSL Dodgers Shoemaker
|Boca Chica North
|San Antonio de Guerra
|Santo Domingo
|Las Palmas Complex
|Los Angeles Dodgers
|-
!scope="row" style="text-align:left"|DSL Giants 1
|Boca Chica Northeast
|Boca Chica
|Santo Domingo
|Felipe Rojas Alou Complex
|San Francisco Giants
|-
!scope="row" style="text-align:left"|DSL Giants 2
|
|Boca Chica
|Santo Domingo
|Felipe Rojas Alou Complex
|San Francisco Giants
|-
!scope="row" style="text-align:left"|DSL Guardians 1
|Boca Chica North
|San Antonio de Guerra
|Santo Domingo
|Cleveland Guardians Complex
|Cleveland Guardians
|-
!scope="row" style="text-align:left"|DSL Guardians 2
|
|San Antonio de Guerra
|Santo Domingo
|Cleveland Guardians Complex
|Cleveland Guardians
|-
!scope="row" style="text-align:left"|DSL Mariners
|Boca Chica Northeast
|San Antonio de Guerra
|Santo Domingo
|Seattle Mariners Complex
|Seattle Mariners
|-
!scope="row" style="text-align:left"|DSL Marlins
|Boca Chica Northwest
|Boca Chica
|Santo Domingo
|Miami Marlins Complex
|Miami Marlins
|-
!scope="row" style="text-align:left"|DSL Mets 1
|Boca Chica South
|Boca Chica
|Santo Domingo
|New York Mets Complex
|New York Mets
|-
!scope="row" style="text-align:left"|DSL Mets 2
|Boca Chica San Pedro de Macorís
|Boca Chica
|Santo Domingo
|New York Mets Complex
|New York Mets
|-
!scope="row" style="text-align:left"|DSL Nationals
|Boca Chica South
|Boca Chica
|Santo Domingo
|Baseball Valley Complex
|Washington Nationals
|-
!scope="row" style="text-align:left"|DSL Orioles 1
|Boca Chica Baseball City
|Boca Chica
|Santo Domingo
|Baseball City Complex
|Baltimore Orioles
|-
!scope="row" style="text-align:left"|DSL Orioles 2
|
|Boca Chica
|Santo Domingo
|Baseball City Complex
|Baltimore Orioles
|-
!scope="row" style="text-align:left"|DSL Padres
|Boca Chica Baseball City
|San Cristóbal
|San Cristóbal
|Najayo Complex
|San Diego Padres
|-
!scope="row" style="text-align:left"|DSL Phillies Red
|Boca Chica South
|Boca Chica
|Santo Domingo
|Philadelphia Phillies Academy
|Philadelphia Phillies
|-
!scope="row" style="text-align:left"|DSL Phillies White
|Boca Chica San Pedro de Macorís
|Boca Chica
|Santo Domingo
|Philadelphia Phillies Academy
|Philadelphia Phillies
|-
!scope="row" style="text-align:left"|DSL Pirates 1
|Boca Chica North
|El Toro
|Peravia
|Pittsburgh Pirates Complex
|Pittsburgh Pirates
|-
!scope="row" style="text-align:left"|DSL Pirates 2
|Boca Chica Northeast
|El Toro
|Peravia
|Pittsburgh Pirates Complex
|Pittsburgh Pirates
|-
!scope="row" style="text-align:left"|DSL Rangers 1
|Boca Chica North
|Boca Chica
|Santo Domingo
|Academia de Prospecto Complex
|Texas Rangers
|-
!scope="row" style="text-align:left"|DSL Rangers 2
|Boca Chica San Pedro de Macorís
|Boca Chica
|Santo Domingo
|Academia de Prospecto Complex
|Texas Rangers
|-
!scope="row" style="text-align:left"|DSL Rays 1
|Boca Chica Northwest
|San Antonio de Guerra
|Santo Domingo
|Tampa Bay Rays Complex
|Tampa Bay Rays
|-
!scope="row" style="text-align:left"|DSL Rays 2
|Boca Chica North
|San Antonio de Guerra
|Santo Domingo
|Tampa Bay Rays Complex
|Tampa Bay Rays
|-
!scope="row" style="text-align:left"|DSL Reds
|Boca Chica Baseball City
|Boca Chica
|Santo Domingo
|Baseball City Complex
|Cincinnati Reds
|-
!scope="row" style="text-align:left"|DSL Red Sox Blue
|Boca Chica Northwest
|El Toro
|Peravia
|El Toro Complex
|Boston Red Sox
|-
!scope="row" style="text-align:left"|DSL Red Sox Red
|Boca Chica North
|El Toro
|Peravia
|El Toro Complex
|Boston Red Sox
|-
!scope="row" style="text-align:left"|DSL Rockies
|Boca Chica South
|Boca Chica
|Santo Domingo
|Colorado Rockies Complex
|Colorado Rockies
|-
!scope="row" style="text-align:left"|DSL Royals 1
|Boca Chica Northwest
|San Antonio de Guerra
|Santo Domingo
|Kansas City Royals Complex
|Kansas City Royals
|-
!scope="row" style="text-align:left"|DSL Royals 2
|Boca Chica Northeast
|San Antonio de Guerra
|Santo Domingo
|Kansas City Royals Complex
|Kansas City Royals
|-
!scope="row" style="text-align:left"|DSL Tigers 1
|Boca Chica San Pedro de Macorís
|San Pedro de Macorís
|San Pedro de Macorís
|Tower Complex
|Detroit Tigers
|-
!scope="row" style="text-align:left"|DSL Tigers 2
|Boca Chica Northeast
|San Pedro de Macorís
|San Pedro de Macorís
|Tower Complex
|Detroit Tigers
|-
!scope="row" style="text-align:left"|DSL Twins
|Boca Chica South
|Boca Chica
|Santo Domingo
|Minnesota Twins Academy
|Minnesota Twins
|-
!scope="row" style="text-align:left"|DSL White Sox
|Boca Chica Baseball City
|Boca Chica
|Santo Domingo
|Baseball City Complex
|Chicago White Sox
|-
!scope="row" style="text-align:left"|DSL Yankees
|Boca Chica South
|Boca Chica
|Santo Domingo
|New York Yankees Complex
|New York Yankees
|-
|}
Fall leagues
Arizona Fall League
The Arizona Fall League, an off-season league owned and operated by Major League Baseball, consists of six teams in the state of Arizona. Each team is affiliated with five MLB organizations.
{| class="wikitable sortable"
|+Overview of Arizona Fall League teams
|-
!scope="col"|Team
!scope="col"|City (all in Arizona)
!scope="col"|Stadium
!scope="col"|Affiliates
|-
!scope="row" style="text-align:left"|Glendale Desert Dogs
|Glendale
|Camelback Ranch
|Chicago White Sox, Los Angeles Dodgers, Philadelphia Phillies, Cincinnati Reds, St. Louis Cardinals
|-
!scope="row" style="text-align:left"|Mesa Solar Sox
|Mesa
|Sloan Park
|Chicago Cubs, Athletics, Boston Red Sox, Los Angeles Angels, Tampa Bay Rays
|-
!scope="row" style="text-align:left"|Peoria Javelinas
|Peoria
|Peoria Sports Complex
|San Diego Padres, Seattle Mariners, Atlanta Braves, Miami Marlins, Milwaukee Brewers
|-
!scope="row" style="text-align:left"|Salt River Rafters
|rowspan=2|Scottsdale
|Salt River Fields at Talking Stick
|Arizona Diamondbacks, Colorado Rockies, New York Yankees, Washington Nationals, Minnesota Twins
|-
!scope="row" style="text-align:left"|Scottsdale Scorpions
|Scottsdale Stadium
|San Francisco Giants, Pittsburgh Pirates, Detroit Tigers, New York Mets, Toronto Blue Jays
|-
!scope="row" style="text-align:left"|Surprise Saguaros
|Surprise
|Surprise Stadium
|Kansas City Royals, Texas Rangers, Cleveland Guardians, Baltimore Orioles, Houston Astros
|}
MLB Partner Leagues
MLB Partner Leagues consist of 50 teams with no direct affiliation with individual MLB organizations, but collaborate on promoting the sport in North America. Three leagues—the American Association, Atlantic League, and Frontier League, had been fully independent leagues. A fourth, the Pioneer League, had previously been affiliated with Minor League Baseball as a "Rookie Advanced" league, the second-lowest rung on the minor league ladder.
American Association of Professional Baseball
The American Association of Professional Baseball consists of 12 teams.
{| class="wikitable sortable"
|+Overview of American Association of Professional Baseball teams
|-
!scope="col"|Team
!scope="col"|Division
!scope="col"|City
!scope="col"|State/Province
!scope="col"|Stadium
!scope="col"|Capacity
|-
!scope="row" style="text-align:left"|Chicago Dogs
|East
|Rosemont
|Illinois
|Impact Field
|6,300
|-
!scope="row" style="text-align:left"|Cleburne Railroaders
| East
|Cleburne
|Texas
|La Moderna Field
|2,500
|-
!scope="row" style="text-align:left"|Fargo-Moorhead RedHawks
|West
|Fargo
|North Dakota
|Newman Outdoor Field
|4,513
|-
!scope="row" style="text-align:left"|Gary SouthShore RailCats
|East
|Gary
|Indiana
|U.S. Steel Yard
|6,139
|-
!scope="row" style="text-align:left"|Kane County Cougars
|East
|Geneva
|Illinois
|Northwestern Medicine Field
|10,923
|-
!scope="row" style="text-align:left"|Kansas City Monarchs
|West
|Kansas City
|Kansas
|Legends Field
|6,537
|-
!scope="row" style="text-align:left"|Lake Country DockHounds
|East
|Oconomowoc
|Wisconsin
|Wisconsin Brewing Company Park
|3,641
|-
!scope="row" style="text-align:left"|Lincoln Saltdogs
|West
|Lincoln
|Nebraska
|Haymarket Park
|8,486
|-
!scope="row" style="text-align:left"|Milwaukee Milkmen
|East
|Franklin
|Wisconsin
|Franklin Field
|4,000
|-
!scope="row" style="text-align:left"|Sioux City Explorers
|West
|Sioux City
|Iowa
|Security National Bank Field at Lewis & Clark Park
|3,631
|-
!scope="row" style="text-align:left"|Sioux Falls Canaries
|West
|Sioux Falls
|South Dakota
|Sioux Falls Stadium
|4,500
|-
!scope="row" style="text-align:left"|Winnipeg Goldeyes
|West
|Winnipeg
|Manitoba
|Blue Cross Park
|7,561
|}
Atlantic League of Professional Baseball
The Atlantic League of Professional Baseball consists of 10 teams.
{| class="wikitable sortable"
|+Overview of Atlantic League of Professional Baseball teams
|-
!scope="col"|Team
!scope="col"|Division
!scope="col"|City
!scope="col"|State
!scope="col"|Stadium
!scope="col"|Capacity
|-
|-
!scope="row" style="text-align:left"|Charleston Dirty Birds
|South
|Charleston
|West Virginia
|GoMart Ballpark
|4,500
|-
!scope="row" style="text-align:left"|Gastonia Ghost Peppers
|South
|Gastonia
|North Carolina
|CaroMont Health Park
| 5,000
|-
!scope="row" style="text-align:left"|Hagerstown Flying Boxcars
|North
|Hagerstown
|Maryland
|Meritus Park
| 5,500
|-
!scope="row" style="text-align:left"|High Point Rockers
|South
|High Point
|North Carolina
|Truist Point
| 8,500
|-
!scope="row" style="text-align:left"|Lancaster Stormers
|North
|Lancaster
|Pennsylvania
|Penn Medicine Park
|8,000
|-
!scope="row" style="text-align:left"|Lexington Legends
|South
|Lexington
|Kentucky
|Legends Field
|9,994
|-
!scope="row" style="text-align:left"|Long Island Ducks
|North
|Central Islip
|New York
|Fairfield Properties Ballpark
|8,002
|-
!scope="row" style="text-align:left"|Southern Maryland Blue Crabs
|South
|Waldorf
|Maryland
|Regency Furniture Stadium
|6,200
|-
!scope="row" style="text-align:left"|Staten Island FerryHawks
|North
|Staten Island
|New York
|SIUH Community Park
|8,171
|-
!scope="row" style="text-align:left"|York Revolution
|North
|York
|Pennsylvania
|WellSpan Park
|7,500
|}
Frontier League
The Frontier League consists of 18 teams.
{| class="wikitable sortable"
|+Overview of Frontier League teams
|-
!scope="col"|Team
!scope="col"|Division
!scope="col"|City
!scope="col"|State/Province
!scope="col"|Stadium
!scope="col"|Capacity
|-
!scope="row" style="text-align:left"|Brockton Rox
|East
|Brockton
|Massachusetts
|Campanelli Stadium
|4,750
|-
!scope="row" style="text-align:left"|Down East Bird Dawgs
|East
|Kinston
|North Carolina
|Grainger Stadium
|3,400
|-
!scope="row" style="text-align:left"|Evansville Otters
|West
|Evansville
|Indiana
|Bosse Field
|5,181
|-
!scope="row" style="text-align:left"|Florence Y'alls
|West
|Florence
|Kentucky
|Thomas More Stadium
|4,500
|-
!scope="row" style="text-align:left"|Gateway Grizzlies
|West
|Sauget
|Illinois
|Arsenal BG Ballpark
|6,000
|-
!scope="row" style="text-align:left"|Joliet Slammers
|West
|Joliet
|Illinois
|Duly Health and Care Field
|6,016
|-
!scope="row" style="text-align:left"|Lake Erie Crushers
|West
|Avon
|Ohio
|ForeFront Field
|5,000
|-
!scope="row" style="text-align:left"|Mississippi Mud Monsters
|West
|Pearl
|Mississippi
|Trustmark Park
|6,500
|-
!scope="row" style="text-align:left"|New Jersey Jackals
|East
|Paterson
|New Jersey
|Hinchliffe Stadium
|10,000
|-
!scope="row" style="text-align:left"|New York Boulders
|East
|Pomona
|New York
|Clover Stadium
|9,362
|-
!scope="row" style="text-align:left"|Ottawa Titans
|East
|Ottawa
|Ontario
|Ottawa Stadium
|10,332
|-
!scope="row" style="text-align:left"|Québec Capitales
|East
|Quebec City
|Quebec
|Stade Canac
|4,297
|-
!scope="row" style="text-align:left"|Schaumburg Boomers
|West
|Schaumburg
|Illinois
|Wintrust Field
|7,365
|-
!scope="row" style="text-align:left"|Sussex County Miners
|East
|Augusta
|New Jersey
|Skylands Stadium
|5,500
|-
!scope="row" style="text-align:left"|Tri-City ValleyCats
|East
|Troy
|New York
|Joseph L. Bruno Stadium
|6,500
|-
!scope="row" style="text-align:left"|Trois-Rivières Aigles
|East
|Trois-Rivières
|Quebec
|Stade Quillorama
|4,000
|-
!scope="row" style="text-align:left"|Washington Wild Things
|West
|Washington
|Pennsylvania
|EQT Park
|5,200
|-
!scope="row" style="text-align:left"|Windy City ThunderBolts
|West
|Crestwood
|Illinois
|Ozinga Field
|4,200
|}
Pioneer League
The Pioneer League consists of 12 teams.
{| class="wikitable sortable"
|+Overview of Pioneer League teams
|-
!scope="col"|Team
!scope="col"|City
!scope="col"|State
!scope="col"|Stadium
!scope="col"|Capacity
|-
!scope="row" style="text-align:left"|Billings Mustangs
|Billings
|Montana
|Dehler Park
|6,500
|-
!scope="row" style="text-align:left"|Boise Hawks
|Boise
|Idaho
|Memorial Stadium
|3,452
|-
!scope="row" style="text-align:left"|Glacier Range Riders
|Kalispell
|Montana
|Glacier Bank Park
|5,500
|-
!scope="row" style="text-align:left"|Great Falls Voyagers
|Great Falls
|Montana
|Centene Stadium
|2,500
|-
!scope="row" style="text-align:left"|Idaho Falls Chukars
|Idaho Falls
|Idaho
|Melaleuca Field
|3,400
|-
!scope="row" style="text-align:left"|Long Beach Coast
|Long Beach
|California
|Blair Field
|3,238
|-
!scope="row" style="text-align:left"|Missoula PaddleHeads
|Missoula
|Montana
|Ogren Park at Allegiance Field
|3,500
|-
!scope="row" style="text-align:left"|Modesto Roadsters
|Modesto
|California
|John Thurman Field
|4,000
|-
!scope="row" style="text-align:left"|Oakland Ballers
|Oakland
|California
|Raimondi Park
|2,500
|-
!scope="row" style="text-align:left"|Ogden Raptors
|Ogden
|Utah
|Lindquist Field
|8,262
|-
!scope="row" style="text-align:left"|RedPocket Mobiles
|colspan=4
|-
!scope="row" style="text-align:left"|Yuba-Sutter Freebirds
|Marysville
|California
|Bryant Field
|3,500
|}
Non-partner independent leagues
Canadian Baseball League
The Canadian Baseball League consists of 9 teams, all in Southern Ontario; from 1919 until 2025, it operated as a semi-professional league known as the Intercounty Baseball League.
{| class="wikitable sortable"
|+Overview of Canadian Baseball League teams
|-
!scope="col"|Team
!scope="col"|City
!scope="col"|Province
!scope="col"|Stadium
|-
!scope="row" style="text-align:left"|Barrie Baycats
|Springwater
|rowspan=9|Ontario
|Athletic Kulture Stadium
|-
!scope="row" style="text-align:left"|Brantford Red Sox
|Brantford
|Arnold Anderson Stadium
|-
!scope="row" style="text-align:left"|Chatham-Kent Barnstormers
|Chatham-Kent
|Fergie Jenkins Field
|-
!scope="row" style="text-align:left"|Guelph Royals
|Guelph
|Hastings Stadium
|-
!scope="row" style="text-align:left"|Hamilton Cardinals
|Hamilton
|Bernie Arbour Memorial Stadium
|-
!scope="row" style="text-align:left"|Kitchener Panthers
|Kitchener
|Jack Couch Park
|-
!scope="row" style="text-align:left"|London Majors
|London
|Labatt Park
|-
!scope="row" style="text-align:left"|Toronto Maple Leafs
|Toronto
|Dominico Field
|-
!scope="row" style="text-align:left"|Welland Jackfish
|Welland
|Welland Stadium
|}
Empire Professional Baseball League
The independent Empire Professional Baseball League consists of 4 teams.
{| class="wikitable sortable"
|+Overview of Empire Professional Baseball League teams
|-
!scope="col"|Team
!scope="col"|City
!scope="col"|State
!scope="col"|Stadium
|-
!scope="row" style="text-align:left"|Malone Border Hounds
|Malone
|rowspan=4|New York
|American Legion Post 219 Veterans Field
|-
!scope="row" style="text-align:left"|North Country Thunderbirds
|Plattsburgh
|Chip Cummings Field
|-
!scope="row" style="text-align:left"|Saranac Lake Surge
|Saranac Lake
|Petrova Field
|-
!scope="row" style="text-align:left"|Tupper Lake Riverpigs
|Tupper Lake
|Municipal Park
|}
Pecos League
The independent Pecos League consists of 16 teams.
{| class="wikitable sortable"
|+Overview of Pecos League teams
|-
!scope="col"|Team
!scope="col"|Division
!scope="col"|City
!scope="col"|State
!scope="col"|Stadium
|-
!scope="row" style="text-align:left"|Alpine Cowboys
|Mountain
|Alpine
|Texas
|Kokernot Field
|-
!scope="row" style="text-align:left"|Austin Weirdos
|Mountain
|Austin
|Texas
|Parque Zaragosa
|-
!scope="row" style="text-align:left"|Bakersfield Train Robbers
|Pacific
|Bakersfield
|California
|Sam Lynn Ballpark
|-
!scope="row" style="text-align:left"|Blackwell FlyCatchers
|Mountain
|Blackwell
|Oklahoma
|Morgan Field
|-
!scope="row" style="text-align:left"|Dublin Leprechauns
|Pacific
|Dublin
|California
|Fallon Sports Park
|-
!scope="row" style="text-align:left"|Garden City Wind
|Mountain
|Garden City
|Kansas
|Clint Lightner Field
|-
!scope="row" style="text-align:left"|Martinez Sturgeon
|Pacific
|Martinez
|California
|Waterfront Park
|-
!scope="row" style="text-align:left"|Marysville Drakes
|Pacific
|Marysville
|California
|Bryant Field
|-
!scope="row" style="text-align:left"|North Platte 80s
|Mountain
|North Platte
|Nebraska
|Bill Wood Field
|-
!scope="row" style="text-align:left"|Pecos Bills
|Mountain
|Pecos
|Texas
|Cyclone Ballpark
|-
!scope="row" style="text-align:left"|Roswell Invaders
|Mountain
|Roswell
|New Mexico
|Joe Baumann Park
|-
!scope="row" style="text-align:left"|San Rafael Pacifics
|Pacific
|San Rafael
|California
|Albert Park
|-
!scope="row" style="text-align:left"|Santa Fe Fuego
|Mountain
|Santa Fe
|New Mexico
|Fort Marcy Park
|-
!scope="row" style="text-align:left"|Trinidad Triggers
|Mountain
|Trinidad
|Colorado
|Central Park
|-
!scope="row" style="text-align:left"|Tucson Saguaros
|Mountain
|Tucson
|Arizona
|Kino Sports Complex
|-
!scope="row" style="text-align:left"|Vallejo Seaweed
|Pacific
|Vallejo
|California
|Wilson Park
|-
|}
United Shore Professional Baseball League
The independent, single-site United Shore Professional Baseball League consists of four teams.
{| class="wikitable sortable"
|+Overview of United Shore Professional Baseball League teams
|-
!scope="col"|Team
!scope="col"|City
!scope="col"|State
!scope="col"|Stadium
!scope="col"|Capacity
|-
!scope="row" style="text-align:left"|Birmingham Bloomfield Beavers
|rowspan=4|Utica
|rowspan=4|Michigan
|rowspan=4|UWM Field
|rowspan=4|4,500
|-
!scope="row" style="text-align:left"|Eastside Diamond Hoppers
|-
!scope="row" style="text-align:left"|Utica Unicorns
|-
!scope="row" style="text-align:left"|Westside Woolly Mammoths
|}
Women's Pro Baseball League
The Women's Pro Baseball League is an independent, professional women's baseball league that will begin play in 2026. All 4 teams, which have yet to be given team nicknames, identities or home stadiums, will play their inaugural season in a single stadium in Illinois.
{| class="wikitable sortable"
|+Overview of United Shore Professional Baseball League teams
|-
!scope="col"|Team
!scope="col"|City
!scope="col"|State
!scope="col"|Stadium
!scope="col"|Capacity
|-
!scope="row" style="text-align:left"|WPBL Boston
|rowspan=4|Springfield
|rowspan=4|Illinois
|rowspan=4|Robin Roberts Stadium
|rowspan=4|5,200
|-
!scope="row" style="text-align:left"|WPBL Los Angeles
|-
!scope="row" style="text-align:left"|WPBL New York
|-
!scope="row" style="text-align:left"|WPBL San Francisco
|}
See also
- List of developmental and minor sports leagues
- List of professional sports leagues#Americas
- List of defunct professional sports leagues
- Minor League Baseball rosters
References
zh:美国职棒小联盟