|Full name||Santiago Urquiaga Pérez|
|Date of birth||18 April 1958|
|Place of birth||Barakaldo, Spain|
|Height||1.77 m (5 ft 9 1⁄2 in)|
|Playing position||Right back|
|* Senior club appearances and goals counted for the domestic league only|
Born in Barakaldo, Biscay, Urquiaga played nine professional seasons with local powerhouse Athletic Bilbao, being an instrumental defensive fixture in the club's back-to-back La Liga conquests (1983–84) and starting in all the 67 games he appeared in during that timeframe. He made his debut in the competition on 13 May 1979, playing 26 minutes in a 0–4 away loss against Atlético Madrid.
Urquiaga's final two seasons were spent with RCD Español, helping the Catalans reach the final of the UEFA Cup in his first year, a penalty shootout loss to Germany's Bayer 04 Leverkusen. He retired in June 1989, at the age of 31.
Urquiaga earned 14 caps for the Spanish national team during four years, and was selected to the squad for the 1982 FIFA World Cup and UEFA Euro 1984, being first-choice at the latter tournament as the nation eventually finished runner-up, to hosts France. His first match occurred on 26 March 1980, in a 0–2 friendly defeat to England in Barcelona.
- Athletic Bilbao
- "Clemente, o la maestría del 'patadón y tente tieso'" [Clemente, or how to be a master of the ‘long ball and grab your balls’] (in Spanish). Medio Centro. 6 March 2008. Retrieved 24 May 2016.
- "Clemente, 25 años después" [Clemente, 25 years after] (in Spanish). Canarias Ahora. 15 September 2008. Retrieved 24 May 2016.
- "1984: Los 'bleus' se coronan tras el error de Arconada" [1984: ‘Bleus’ crowned after Arconada's mistake]. Mundo Deportivo (in Spanish). 13 April 2016. Retrieved 24 May 2016.