Eugenio Vallarino de Iraola (13 November 1886 – 31 December 1919[citation needed]) was a Spanish footballer who played as a midfielder for Madrid FC and Real Valladolid.
When Madrid FC endorsed a tournament in the capital for the May festivities, which became known as Copa de la Coronación, the forerunner of the Copa del Rey founded a year later, his brother Manuel organized a series of matches between the club's members as part of New's build-up to the tournament, and Eugenio played in two of these matches, on 30 March and 6 April 1902.
After the poor sporting results experienced, chaos settled within the entity, and as a result of the disagreements among its members, many of them, including the Vallarino brothers, decided to leave the club, but while Manuel joined Madrid FC, Eugenio decided to participate in the foundation of a new one, Internacional Foot-ball Club, in January 1903.
[3] He appeared on the club's first board of directors as a member alongside Angel Garrido and Miguel de Valdeterrazo.
[3] On 8 February, Vallarino started for Internacional in a friendly match against Madrid FC, which ended in a 4–0 loss.