Guides
How the leagues work
A short history, the championship, where to reach the league, and the clubs on the published list. The longer timeline is History of Baseball. Innings stay on their own page.
The leagues
- MLBMLBTwo leagues, six divisions, and a full game of nine innings on the MLB glossary.
- MiLBMiLBThe affiliated clubs that develop players for Major League organizations, from Triple-A through Single-A.
- NCAANCAADivision I baseball on the standings file, with the championship played as the Men's College World Series in Omaha.
- WBCWBCThe 2026 World Baseball Classic: four pools of five, then a knockout round that ends in Miami.
- OlympicsOlympicsMen's Olympic baseball, back at Tokyo 2020 and on the programme again for Los Angeles 2028.
- Dominican RepublicLIDOMLiga de Beisbol Dominicano, from the winter league team file.
- VenezuelaLVBPLiga Venezuela Beisbol Profesional, from the winter league team file.
- MexicoLMPLiga Mexicana del Pacifico, from the winter league team file.
- Puerto RicoPuerto RicoLiga de Beisbol Profesional Roberto Clemente, from the winter league team file.
- AustraliaABLAustralian Baseball League, from the winter league team file.
- CaribbeanCaribbean SeriesCaribbean Series, from the winter league team file.
Other countries
- JapanNPBNippon Professional Baseball: a Central League, a Pacific League, and a Nippon Series.
- KoreaKBOOne league of 10 clubs. The regular-season winner waits, and the Korean Series decides the championship.
- TaiwanCPBLThe Chinese Professional Baseball League, six clubs on the official standings page, with a Taiwan Series.