[1] The Nicaraguan professional league was formed in 1956, with five teams: Indios del Bóer, Cinco Estrellas, San Fernando, León, and Flor de Caña.

The first season was suspended in September 1956 due to the assassination of Anastasio Somoza García, but the tournament resumed in March 1957.

Due to economic difficulties, the league had to shut down in 1967, though baseball continued to be played in an amateur format.

[11] This tournament, won by Leones de León, was a success; Nicaraguan organizers hoped it would allow them to join the Caribbean Series, but such an invitation was not forthcoming.

[13] Their entry was controversial, because it was alleged that the regime of Daniel Ortega offered $1 million to the Caribbean Professional Baseball Confederation to secure the participation in the tournament.