Juan Isa (August 26, 1913 — October 19, 1993) was a Venezuelan-born Dutch Antillean baseball executive, administrator, and businessman.

He expanded FIBA's reach to include Europe, inviting the Netherlands and Italy to the 1970 Amateur World Series.

[4][5] During his term as head of FIBA, the organization was rocked by several controversies, such as Isa's decision to allow Dutch Antillean players from Curaçao and Aruba to represent the Netherlands in international competition, despite the objections of the Italian federation.

[4] Isa was criticized for centralizing control of the organization, as well as the arbitrary removal of Nicaragua from hosting the 1973 Amateur World Series.

[4] After that, several national federations, including Italy, Nicaragua, and the United States, left FIBA to form FEMBA (Spanish: Federación Mundial de Béisbol Amateur), causing a split in the international baseball world.