Juan Pablo has been playing for Club Atlético del Rosario, one of Argentina's oldest clubs, since 2009.[7] Estelles also turned out for the Pampas XV in the Vodacom Cup between 2009 and 2013. The swift centre represented Argentina 7s at various age group levels and became a regular for the country in the World Rugby Sevens Series. He also represented his country at the international level with Pumas against Chile, Scotland, and England.
Most recently Estelles helped the Wanderers reach the final of the 2016/17 Aviva 'A' League but on being called up to Saints' first team due to other injuries in the squad, the winger, too, found himself injured and missed out on the final where the Wanderers defeated Gloucester United to claim the title.[12]