Here is a comprehensive summary of the Delfín Sporting Club article:

Delfín Sporting Club, nicknamed El ídolo de Manta, is a football club from Manta, Ecuador, founded on 1 March 1989 after Club Deportivo 9 de Octubre was ceded to a group of directors. After fluctuating between divisions, the club returned to the top-flight Serie A in 2016, where Argentine forward Maximiliano Barreiro led the league with 26 goals. Their historic 2017 season saw them win the first stage of the Serie A, earn a maiden Copa Libertadores spot (a first for the Manabí province), and finish as league runners-up to Emelec. In 2018, they secured their first international win, a 2–0 victory over Chile's Colo-Colo in the Copa Libertadores. The club's greatest triumph came in 2019 when they won their first Serie A title, beating Liga Deportiva Universitaria de Quito in the final—the first top-flight championship for a team from their province. They play their home games at Estadio Jocay and contest the Clásico Manabita rivalry against LDU Portoviejo.