Mariño with Valladolid in 2014
|Full name||Diego Mariño Villar|
|Date of birth||9 May 1990|
|Place of birth||Vigo, Spain|
|Height||1.85 m (6 ft 1 in)|
|2014–2015||→ Levante (loan)||32||(0)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 10 June 2018|
Born in Vigo, Galicia, Mariño played for Villarreal CF since the age of 14, having already represented four teams as a youth. He made his professional debut in the 2010–11 season, helping the reserves barely avoid relegation from the second division while appearing in 38 games.
Mariño was again first-choice in the following campaign, but as the main squad suffered relegation in La Liga the B's were forced to drop down to the third level even though the team finished in a comfortable 12th position. After the departures of longtime incumbent Diego López and 41-year-old César (the latter retired), he was promoted to the first team by manager Julio Velázquez – also his boss in the second side.
Valladolid / Levante
On 5 July 2013, Mariño signed a five-year contract with Real Valladolid, with Villarreal retaining an option to buy him back for €300,000. He made his debut in the top flight on 17 August, in a 1–2 home loss against Athletic Bilbao.
On 1 July 2016, after Levante's relegation, Mariño joined Sporting de Gijón for four years. Second-choice to Iván Cuéllar, he made his debut on 26 November in a 1–2 loss at leaders Real Madrid.
On 18 January 2018, Mariño extended his contract until 2022. Between 4 February and 1 April he was unbeaten during 764 minutes and, at the end of the season, he was named Sporting's player of the year.
In the tournament in Denmark, Mariño was a backup to Atlético Madrid's David de Gea as the nation won its third title in the category. The following year, he repeated the role for the under-23 side in a group stage exit at the Summer Olympic Games in Great Britain.
- El vigués Diego Mariño jugará el próximo curso en el Villarreal B (Vigo's Diego Mariño will play next season with Villarreal B); La Voz de Galicia, 9 June 2010 (in Spanish)
- El Real Valladolid ficha al portero Diego Mariño (Real Valladolid sign goalkeeper Diego Mariño); El Norte de Castilla, 5 July 2013 (in Spanish)
- Valverde tastes opening-day win; ESPN FC, 17 August 2013
- Mariño se incorpora a la disciplina del Levante UD (Mariño joins Levante UD's discipline) Archived 11 August 2014 at the Wayback Machine.; Levante UD, 8 August 2014 (in Spanish)
- El Levante incorpora a Mariño como cedido (Levante add Mariño as a loanee); Europa Press, 8 August 2014 (in Spanish)
- Mariño se compromete por el Levante por las tres próximas temporadas (Mariño committs to Levante for the following three seasons); Levante UD, 31 August 2015 (in Spanish)
- La portería rojiblanca se refuerza con Diego Mariño (The red-and-white goal bolsters with Diego Mariño) Archived 4 July 2016 at the Wayback Machine.; Sporting Gijón, 1 July 2016 (in Spanish)
- "A Mariño le espera un complicado debut" [A tough debut awaits Mariño] (in Spanish). El Desmarque. 25 November 2016. Retrieved 8 March 2017.
- "Real Madrid 2–1 Sporting Gijón". BBC Sport. 26 November 2016. Retrieved 8 March 2017.
- "Diego Mariño, rojiblanco hasta 2022" [Diego Mariño, red-and-white until 2022] (in Spanish). Sporting Gijón. 18 January 2018. Retrieved 19 January 2018.
- Estefanía Domingo Carruébano (2 April 2018). "764 minutos para seguir soñando" [764 minutes to continue dreaming] (in Spanish). Vavel. Retrieved 28 June 2018.
- Ángel Cabranes (22 July 2018). "Mariño, "Molinón de plata": "Devolveré el cariño dando el callo en el campo"" [Mariño, "silver Molinón": "I will return the love by busting my ass on the field"] (in Spanish). La Nueva España. Retrieved 28 July 2018.
- "España sub-21, campeona de Europa: El ciclo continúa" [Spain under-21, European champions: The cycle continues] (in Spanish). Diarios de Fútbol. 25 June 2011. Retrieved 8 September 2017.
- "Euro 2012 trio Mata, Alba & Martinez in Spain Olympic squad". BBC Sport. 5 July 2012. Retrieved 8 September 2017.