Since 1989, the club has played their home games in Estadio Jocay located in the coastal city of Manta, Ecuador.

It was Efrén Delgado, Otto Schwarz, and Benincaza whom later joined to create 9 de Octubre-Delfín, which later it renamed Delfín Sporting Club.

This automatically qualified Delfín a spot for the first time to a Copa Libertadores, which made them the first team from the Manabi province to enter an international tournament.

On 17 December, Delfín lost to Emelec 2–0 in the second leg of the final for the Ecuadorian Serie A championship in el Estadio Jocay and therefore ended the season as runner-up.

On 5 April 2018, Delfín achieved its first international win after defeating 2–0 Chilean club Colo-Colo at the 2018 Copa Libertadores.