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Baseball’s popularity in South America continued to go up at a seemingly exponential rate, leading Beisbol Sudamerica officials to plan the fourth expansion by the end of the 2020s. BSA’s previous expansions had come in 1974, 1987, and 2009. The 2029 plan kept the format of three divisions per league, but added a new team to each division. Thus, both leagues would have three divisions of seven teams for 42 total squads in South America.



The Bolivar League added the Maracay Misfits to the Venezuela Division. The Colombia-Ecuador Division finally got a second Ecuadoran team with the Bucaramanga Battalion. Meanwhile, the Peru-Bolivia Division welcomed its third Bolivian team with the Cochabamba Bashers.

Two new Brazilian teams entered the Southern Cone League with the Belem Blue Crabs for the North Division and the Curitiba Carnivores for the Southeast Division. The South Central Division introduced the Valparaiso Voodoo for a third Chilean team. BSA now had 11 Brazilian teams, five from Argentina, three from Chile, four from Peru, three from Bolivia, seven from Venezuela, five from Colombia, two from Ecuador, one from Uruguay, and one from Paraguay.



The playoff structure was unchanged with the three division champs and two wild cards advancing from each league. Seeding remained based on record and not based on position, meaning wild cards could be ranked higher than weaker division champs.