The Baloncesto Superior Nacional or BSN (lit. "National Superior Basketball") is the main Puerto Rican men's basketball league. It currently has 10 teams, but has had many teams in several cities of the island. The league was established in 1929. It has produced players that have distinguished themselves in the NBA, European Leagues, and other leagues. Also most of the players in the Puerto Rico men's national basketball team are playing in the league.