|Full name||Marcos Vales Illanes|
|Date of birth||5 April 1975|
|Place of birth||A Coruña, Spain|
|Height||1.81 m (5 ft 11 1⁄2 in)|
|Deportivo La Coruña|
|1993–1994||Deportivo La Coruña||19||(1)|
|* Senior club appearances and goals counted for the domestic league only
Born in A Coruña, Vales made his professional debuts with local Deportivo de La Coruña. As Super Depor came to fruition, he was sparingly used during his two-year spell with the Galicians, leaving at the age of 19. Only linked to the club with an amateur contract, he moved to Asturias and signed with Sporting de Gijón, with Deportivo president Augusto César Lendoiro proceeding to engage in a lengthy court battle, which was eventually resolved in the footballer's favour.
After three seasons with Sporting, only starting in the latter as the team finished 15th in La Liga, Vales signed with fellow league side Real Zaragoza for 200 million pesetas. He started regularly in his first years, but was already a fringe player in the 2000–01 campaign when the Aragonese won the Copa del Rey.
In the 2002 summer, following Zaragoza's relegation, Vales moved to Sevilla FC also in the top flight. In his first season he was first-choice, notably scoring the game's only goal in a local derby against Real Betis on 2 March 2003.
Vales missed the vast majority of 2003–04 due to a foot injury. He then signed with RCD Mallorca, but suffered a relapse in his condition and eventually decided to retired at age 30, with Spanish top flight totals of 228 games and 18 goals.
On 14 October 1998, Vales earned his first – and only – cap for Spain: it consisted of one minute in a 2–1 win in Israel for the UEFA Euro 2000 qualifiers, after coming on as a substitute for Real Madrid's Raúl.
- Spain U21
- El Deportivo no sale del juzgado (Deportivo can't leave the courtroom); La Voz de Galicia, 6 October 2009 (in Spanish)
- El Sevilla reflota en el coto del Betis (Sevilla stays afloat in Betis territory); El Mundo, 2 March 2003 (in Spanish)
- El sevillista Marcos Vales estará dos meses de baja tras ser operado en Barcelona de su lesión en un pie (Sevilla's Marcos Vales to miss two months after undergoing foot surgery in Barcelona)[permanent dead link]; Sport Lider, 4 March 2004 (in Spanish)
- España reacciona al tratamiento de choque (Spain reacts to shock treatment); El País, 15 October 1998 (in Spanish)