List of MLB Teams: There is a set of two rosters for an MLB team which consists of a 25-man roster and a 40-man roster. The main team that is selected to play and goes to games is the 25-man roster. The 40-man roster consists of the 25-man roster plus additional players that are on a major league contract. They are the minor league players or players on injured reserve.
A total of 30 MLB teams exist. They are divided into two sets – American League and National League. The American League consists of 15 teams and the National League has 15 teams. Furthermore, each of the leagues is divided into three groups – the East, the Central, and the West.
National League
East
Atlanta Braves
Miami Marlins
New York Mets
Philadelphia Phillies
Washington Nationals
Central
Chicago Cubs
Cincinnati Reds
Milwaukee Brewers
Pittsburgh Pirates
St. Louis Cardinals
West
Arizona Diamondbacks
Colorado Rockies
Los Angeles Dodgers
San Diego Padres
San Francisco Giants
American League
East
Baltimore Orioles
Boston Red Sox
New York Yankees
Tampa Bay Rays
Toronto Blue Jays
Central
Chicago White Sox
Cleveland Indians
Detroit Tigers
Kansas City Royals
Minnesota Twins
West
Houston Astros
Los Angeles Angels
Oakland Athletics
Seattle Mariners
Texas Rangers
List of Teams and stadiums
| Team Name | Arena Name | Arena Location | Seating Capacity | Opening Year |
| Arizona Diamondbacks | Chase Field | Phoenix, Arizona | 48,686 | 1998 |
| Atlanta Braves | SunTrust Park | Cumberland, Georgia | 41,084 | 2017 |
| Baltimore Orioles | Oriole Park at Camden Yards | Baltimore, Maryland | 45,971 | 1992 |
| Boston Red Sox | Fenway Park | Boston, Massachusetts | 37,755 | 1912 |
| Chicago Cubs | Wrigley Field | Chicago, Illinois | 41,649 | 1914 |
| Chicago White Sox | Guaranteed Rate Field | Chicago, Illinois | 40,615 | 1991 |
| Cincinnati Reds | Great American Ball Park | Cincinnati, Ohio | 42,319 | 2003 |
| Cleveland Guardians | Progressive Field | Cleveland, Ohio | 34,788 | 1994 |
| Colorado Rockies | Coors Field | Denver, Colorado | 50,445 | 1995 |
| Detroit Tigers | Comerica Park | Detroit, Michigan | 41,083 | 2000 |
| Houston Astros | Minute Maid Park | Houston, Texas | 41,168 | 2000 |
| Kansas City Royals | Kauffman Stadium | Kansas City, Missouri | 37,903 | 1973 |
| Los Angeles Angels | Angel Stadium | Los Angeles, California | 45,517 | 1966 |
| Los Angeles Dodgers | Dodger Stadium | Los Angeles, California | 56,000 | 1962 |
| Miami Marlins | Marlins Park | Miami, Florida | 36,742 | 2012 |
| Milwaukee Brewers | Miller Park | Milwaukee, Wisconsin | 41,900 | 2001 |
| Minnesota Twins | Target Field | Minneapolis, Minnesota | 38,544 | 2010 |
| New York Mets | Citi Field | Queens, New York | 41,922 | 2009 |
| New York Yankees | Yankee Stadium | Bronx, New York | 47,309 | 2009 |
| Oakland Athletics | RingCentral Coliseum | Oakland, California | 46,847 | 1966 |
| Philadelphia Phillies | Citizens Bank Park | Philadelphia, Pennsylvania | 42,792 | 2004 |
| Pittsburgh Pirates | PNC Park | Pittsburgh, Pennsylvania | 38,747 | 2001 |
| San Diego Padres | Petco Park | San Diego, California | 40,209 | 2004 |
| San Francisco Giants | Oracle Park | San Francisco, California | 41,915 | 2000 |
| Seattle Mariners | T-Mobile Park | Seattle, Washington | 47,929 | 1999 |
| St. Louis Cardinals | Busch Stadium | St. Louis, Missouri | 45,494 | 2006 |
| Tampa Bay Rays | Tropicana Field | St. Petersburg, Florida | 25,000 | 1990 |
| Texas Rangers | Globe Life Field | Arlington, Texas | 40,300 | 2020 |
| Toronto Blue Jays | Rogers Centre | Toronto, Ontario | 49,282 | 1989 |
| Washington Nationals | Nationals Park | Washington, D.C. | 41,339 | 2008 |
