At the time, the group considered expanding its membership to Nicaragua, Honduras, and Colombia,[3] though this did not occur before the first Caribbean Series was hosted in 1949.

Its creation was sponsored by National Association president George Trautman, who ensured that the various winter leagues were affiliated with MLB-affiliated Organized Baseball.

However, it was reorganized for the 1970 Caribbean Series with three teams, the Dominican Republic replacing Cuba and Panama (whose professional league had also ceased operations).

[6] Reportedly, CPBC organizers were unhappy with Cuba and Colombia's participation in the 2023 Baseball Champions League Americas, a WBSC-sponsored club tournament.

[7] Commenting on the exclusion of Cuba from the 2024 tournament, CPBC President Juan Francisco Puello Herrera acknowledged that commercial factors were taken into account, but denied that they were the main reasons.