|Full name||Marcelino Martínez Cao|
|Date of birth||29 April 1940|
|Place of birth||Ares, Spain|
|Height||1.73 m (5 ft 8 in)|
|* Senior club appearances and goals counted for the domestic league only|
Marcelino was born in Ares, Province of A Coruña, Galicia. In 1959 he signed with Real Zaragoza from local Racing de Ferrol, going on to remain with the former club until his retirement 11 years later.
During his spell with the Aragonese, always spent in La Liga, Marcelino scored 117 official goals, contributing solidly to the conquest of three major titles, including two Copa del Rey trophies. He was part of an efficient attacking unit dubbed Los Magníficos (The Magnificent) which also featured Canário, Carlos Lapetra, Eleuterio Santos and Juan Manuel Villa.
Marcelino played 14 times for the Spain national team, participating in the 1964 European Nations' Cup and the 1966 FIFA World Cup. In the former tournament he scored the decisive 2–1 in the final against the Soviet Union, through a header.
|1.||23 November 1961||Santiago Bernabéu, Madrid, Spain||Morocco||1–0||3–2||1962 World Cup qualification|
|2.||11 March 1964||Sánchez Pizjuán, Seville, Spain||Republic of Ireland||4–1||5–1||1964 European Nations' Cup qualifying|
|3.||11 March 1964||Sánchez Pizjuán, Seville, Spain||Republic of Ireland||5–1||5–1||1964 European Nations' Cup qualifying|
|4.||21 June 1964||Santiago Bernabéu, Madrid, Spain||Soviet Union||2–1||2–1||1964 European Nations' Cup|
- "Marcelino" (in Spanish). Historias Racinguistas. 3 June 2008. Retrieved 9 December 2009.
- Gay, Miguel (23 April 2014). "Los años Magníficos" [The Magnificent years]. Heraldo de Aragón (in Spanish). Retrieved 27 April 2018.
- "Final del 64" [64 final]. El Mundo (in Spanish). 2004. Retrieved 25 June 2013.
- "Marcelino". European Football. Retrieved 4 September 2017.
- "R. Zaragoza, 2 – At. de Madrid, 1". Mundo Deportivo (in Spanish). 6 July 1964. Retrieved 27 April 2018.
- "El Zaragoza conquistó brillantemente la Copa de S.E." [Zaragoza won the S.E. Cup brilliantly]. Mundo Deportivo (in Spanish). 30 May 1966. Retrieved 27 April 2018.
- "El Real Zaragoza, campeón de la Copa de Ferias en 1964" [Real Zaragoza, Fairs Cup champions in 1964]. Heraldo de Aragón (in Spanish). 25 June 2014. Retrieved 27 April 2018.