MLB League Guide
INDEXAbout Major League Baseball
Major League Baseball (MLB) is the top professional baseball league in North America, made up of 30 teams. The teams are split into two leagues: the American League (AL) and the National League (NL), each with 15 teams. Both leagues are further divided into three divisions: East, Central, and West. The regular season runs from late March or early April through the end of September, with each team playing 162 games. The top teams then advance to the postseason, which culminates in the World Series, a best-of-seven championship series between the AL and NL pennant winners. The designated hitter has been used in both leagues since 2022, and a pitch clock helps keep the pace of play moving.
Frequently Asked Questions
Q: How many teams are in MLB?
A: There are 30 teams, divided evenly between the American League and the National League with 15 teams each.
Q: How many games are in an MLB regular season?
A: Each team plays 162 regular-season games, typically from late March or early April through the end of September.
Q: What is the World Series?
A: The World Series is MLB's championship, a best-of-seven series between the American League and National League pennant winners.