The term “league” refers to a hierarchy of baseball teams. There are different types of league, and in each one, teams play against each other until a winner is determined. Each league is played to completion in what is known as a season, and different leagues can run concurrently with other leagues.

In baseball, there are several professional baseball leagues. Major League Baseball (MLB) for example, consists of two leagues of 15 teams and 3 divisions. The two leagues in MLB are the American League and the National League.

In Minor League Baseball (MiLB), there are even more leagues and each one represents the level of professionalism that the teams are playing on. 120 Different teams play in MiLB, meaning that the various leagues and divisions that make it up are great in number.

There are both professional and unprofessional baseball leagues, and they encompass a spectrum of ages, skill levels and abilities.