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 Basketball. Playing rules stay on Rules of Basketball.
The leagues
- NBANBAThirty clubs, an 82-game regular season, a Play-In, and a champion decided in the NBA Finals.
- WNBAWNBAFifteen clubs, a 44-game regular season, and an eight-team playoff that ends with the WNBA Finals.
- NCAANCAAMen’s Division I basketball on this desk, with the championship played as the NCAA tournament NCAA.com calls March Madness.
- G LeagueG LeagueThe NBA’s official minor league: 31 clubs in 2026–27, 30 of them one-to-one affiliates of NBA franchises.