|Full name||Juan María Emery Alza|
|Date of birth||18 February 1933|
|Place of birth||Irun, Spain|
|Date of death||10 May 2015(aged 82)|
|Place of death||Hondarribia, Spain|
|Height||1.73 m (5 ft 8 in)|
|1959–1962||Deportivo La Coruña||54||(0)|
|* Senior club appearances and goals counted for the domestic league only|
Born in Irun, Gipuzkoa, Emery began playing professionally with CD Logroñés, making his debut in Segunda División in a 2–1 home win over Cultural Leonesa on 7 November 1954. After the club's relegation at the end of his third season, he moved to his hometown side Real Unión, suffering the same fate in 1959.
Subsequently, Emery signed for Deportivo de La Coruña, where he spent a further three campaigns in the second level. He contributed with 14 games as his team promoted to La Liga in 1962, as champions, but remained in the former tier until his retirement, in representation of Sporting de Gijón, Recreativo de Huelva and Granada CF, before retiring in 1967 after a spell with amateurs Real Jaén.
Emery was comparatively short for a goalkeeper at 1.73 m, but was remembered for his quick reflexes.
Emery's father, Antonio, was also a footballer and a goalkeeper, playing mainly for Real Unión. His son, Unai, was a midfielder who later went into management, notably with Valencia CF and Sevilla FC; his elder brother, Román, was also a midfielder, and the two shared teams at Logroñés.
- "Fallece Juan Emery, exportero y padre de Unai" [Juan Emery, former goalkeeper and father of Unai, dies]. El Diario Vasco (in Spanish). 10 May 2015. Retrieved 11 May 2015.
- "Segunda División" [Second Division]. Mundo Deportivo (in Spanish). 2 April 1962. Retrieved 12 May 2015.
- Cima, J.E. (5 June 2010). "Emery: hijo de portero, padre de entrenador" [Emery: son of a goalkeeper, father of a coach]. La Nueva España (in Spanish). Retrieved 11 May 2015.
- "La dinastía de los Emery" [Emery dynasty]. El Comercio (in Spanish). 15 November 2008. Retrieved 11 May 2015.
- Cudeiro, Juan L. (20 May 2011). "Vidas cruzadas en la saga de los Emery" [Crossed paths in Emery saga]. El País (in Spanish). Retrieved 11 May 2015.
- Guevara, Rocío (10 May 2015). "Muere el padre de Unai Emery" [The father of Unai Emery dies]. Marca (in Spanish). Retrieved 11 May 2015.
- Juan Emery at BDFutbol