How Many Teams Are in MLB?
TL;DR
- There are currently 30 Major League Baseball teams, split evenly between the American League and the National League.
- Each league has 15 teams organized into three divisions: East, Central, and West.
- MLB’s 30-team structure reflects decades of expansion, relocation, and changes to the league’s competitive format.
If you’re wondering how many teams in the MLB compete each season, the answer is 30. Major League Baseball consists of 30 member clubs across the United States and Canada. The league divides those teams equally between the American League and the National League, with 15 teams in each.
That 30-team structure has been in place since the Arizona Diamondbacks and Tampa Bay Devil Rays joined MLB in 1998. Since then, the league has continued to evolve through realignment, schedule changes, and postseason expansion.
But why 30 teams? And how exactly are they organized?
Let’s break down the structure of Major League Baseball.
How Are the 30 MLB Teams Divided?
The 30 MLB teams are split into two leagues:
- American League: 15 teams
- National League: 15 teams
Each league contains three divisions:
- East
- Central
- West
That means every division has five teams.
American League
AL East
- Baltimore Orioles
- Boston Red Sox
- New York Yankees
- Tampa Bay Rays
- Toronto Blue Jays
AL Central
- Chicago White Sox
- Cleveland Guardians
- Detroit Tigers
- Kansas City Royals
- Minnesota Twins
AL West
- Houston Astros
- Los Angeles Angels
- Athletics
- Seattle Mariners
- Texas Rangers
National League
NL East
- Atlanta Braves
- Miami Marlins
- New York Mets
- Philadelphia Phillies
- Washington Nationals
NL Central
- Chicago Cubs
- Cincinnati Reds
- Milwaukee Brewers
- Pittsburgh Pirates
- St. Louis Cardinals
NL West
- Arizona Diamondbacks
- Colorado Rockies
- Los Angeles Dodgers
- San Diego Padres
- San Francisco Giants
MLB’s current structure gives each division five teams and each league 15 teams.
Why Does MLB Have 30 Teams?
MLB didn’t always have 30 baseball teams. The league’s current size resulted from decades of expansion as baseball grew into a national and eventually international sport.
One of the most significant periods of expansion came in the 1990s. MLB added the Colorado Rockies and Florida Marlins in 1993, bringing the league to 28 teams. The Arizona Diamondbacks and Tampa Bay Devil Rays followed in 1998, bringing MLB to its current total of 30.
Ever since then, MLB hasn’t added another franchise. The 30-team structure has allowed the league to maintain an even number of clubs while providing a balanced distribution of teams across its six divisions.
How Does Having 30 Teams Affect the MLB Schedule?
With 30 teams spread across the country, MLB has plenty of matchups to work into its regular-season schedule.
Every team plays a 162-game regular MLB season, giving fans plenty of opportunities to see their favorite clubs compete. The schedule includes:
- Division games
- Other games within the same league
- Interleague games
- Series against teams from the opposite league
Interleague play has become an increasingly important part of the MLB schedule. Fans can see matchups that historically would’ve happened only during the World Series, such as Yankees-Dodgers or Cubs-Red Sox, during the regular season.
That’s one of the perks of following baseball in the modern era. You don’t have to wait until October to see some of the sport’s biggest franchises face off.
How Many Teams Make the MLB Playoffs?
Having 30 teams doesn’t mean every club has an equal path to the postseason.
Under MLB’s current playoff structure, 12 teams qualify for the postseason: six from the American League and six from the National League.
Each league sends:
- Three division winners
- Three Wild Card teams
The postseason then determines which team from each baseball league advances to the World Series.
That means only a portion of MLB’s 30 teams get a chance to compete for the championship each year, making the regular season particularly important. A team has 162 games to position itself for October baseball.
Key Takeaways:
- MLB’s 30-team structure gives every division five teams, creating a straightforward organizational format across the American and National leagues.
- Baseball’s current league structure is the product of decades of expansion, including major growth during the 1990s.
- With 162 regular-season games and 12 postseason spots, every MLB team has a long road to the World Series, giving fans plenty to follow throughout the season.
Sources:
All 30 MLB Teams: Location, Stadium and Website Information | MLB