|Full name||Eloy José Olaya Prendes|
|Date of birth||10 July 1964|
|Place of birth||Gijón, Spain|
|Height||1.67 m (5 ft 5 1⁄2 in)|
|* Senior club appearances and goals counted for the domestic league only.
During his career, Eloy played for Sporting de Gijón (being part of a strong 80's team that achieved two fourth places in La Liga, in 1985 and 1987, with the player scoring 11 goals in 43 games in the latter season), Valencia CF (with roughly the same individual records, helping the Che to a runner-up spot in the 1989–90 campaign) and CD Badajoz (retiring after an unassuming Segunda División spell). On 28 November 1979, aged only 15, he made his professional debut, appearing with the Asturias side in a Copa del Rey contest against CD Turón as the Royal Spanish Football Federation did not allow clubs to field players from the reserves, which were able to also compete in the tournament in that period.
During slightly less than five years, Eloy earned 15 caps and scored four goals for the Spain national team. He was a participant in the 1986 FIFA World Cup where he netted against Algeria in a 3–0 win, also missing in a penalty shootout quarter-final loss to Belgium, and UEFA Euro 1988 (no appearances).
|1.||22 January 1986||Insular, Las Palmas, Spain||Soviet Union||2–0||2–0||Friendly|
|2.||12 June 1986||Tecnológico, Monterrey, Mexico||Algeria||0–3||0–3||1986 FIFA World Cup|
|3.||1 April 1987||Prater, Vienna, Austria||Austria||0–1||2–3||Euro 1988 qualifying|
|4.||1 April 1987||Prater, Vienna, Austria||Austria||1–2||2–3||Euro 1988 qualifying|
- Spain U21
- Eloy jugó en la Copa con 15 años (Eloy played in Cup at the age of 15); La Nueva España, 9 October 2009 (in Spanish)
- "El Sporting se plantea recuperar a Eloy Olaya" [Sporting thinking about bringing Eloy Olaya back] (in Spanish). El Comercio. 10 November 2011. Retrieved 22 April 2016.
- "1–1: Buenas noches, España" [1–1: Good night, Spain] (in Spanish). Mundo Deportivo. 23 June 1986. Retrieved 2 June 2014.
- "0–0: Nos congelamos todos" [0–0: We all froze] (PDF) (in Spanish). Mundo Deportivo. 21 November 1985. Retrieved 21 April 2016.
- Supertítulo (Supertitle); Mundo Deportivo, 28 June 1995 (in Spanish)
- ¡¡¡Campeones!!! (Champions!!!); Mundo Deportivo, 30 October 1986 (in Spanish)