델핀

Delfín SC was founded on 1 March 1989; after founder of Club Deportivo 9 de Octubre Pedro Azua ceded the team to a group of directors from Club Social Delfín. It was Efrén Delgado, Otto Schwarz, and Benincaza whom later joined to create 9 de Octubre-Delfín, which later it renamed Delfín Sporting Club. The club started off on a strong note winning the Serie B championship in 1989 and gaining promotion to the top-flight Serie A in its first season. Surprisingly, the young team was able to stay in Serie A until 1995, when it was relegated back to the Serie B. During their time in the Serie A, the club gained the nickname El ídolo de Manta (Manta's Idol), a nickname previously given to Manta Sport Club, which was Manta's previous team in the top-flight.

In 1998, the club returned to the top-flight, only to return to the Serie B in 1999 and bounce back up in 2000. Their last season in the Serie A was in 2001. In 2007, they were relegated to the third-level Segunda Categoría. Having gained promotion to the Ecuadorian Serie B, they were then promoted to the Ecuadorian Serie A for the 2016 season, in which their Argentine forward Maximiliano Barreiro was the league's top scorer, with 26 goals.

The following 2017 season was the club's historic year, standing strong with only one loss in the first leg of the season and winning La Primera Etapa of the Ecuadorian Serie A. 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. Delfín ended in fourth place at the end of the season, which gave them a straight ticket to their second Copa Libertadores.

2019 marked the greatest year for the team as they won their first Serie A title, and the first time a team from their province won any title. The final was played against Liga Deportiva Universitaria de Quito.