|Full name||Roberto Simón Marina|
|Date of birth||28 August 1961|
|Place of birth||Villanueva de la Serena, Spain|
|Height||1.66 m (5 ft 5 1⁄2 in)|
|CD Las Islas|
|?–?||Atlético Madrid C|
|2001–2003||Atlético Madrid (assistant)|
|2003–2006||Atlético Madrid B (assistant)|
|2006||Atlético Madrid (assistant)|
|2014||Levski Sofia (assistant)|
|2014||Atlético Madrid B|
|2016–2017||Legirus Inter (assistant)|
|* Senior club appearances and goals counted for the domestic league only|
Born in Villanueva de la Serena, Province of Badajoz, Marina started his professional career with Atlético Madrid, being definitely promoted to the first team for the 1982–83 season and scoring five goals in 25 games as they finished in third position in La Liga. With the Colchoneros, he won the Copa del Rey in 1985 and was subsequently a starter in the 1986 European Cup Winners' Cup Final, lost 0–3 to FC Dynamo Kyiv.
After amassing 315 official appearances with the Madrid side, with the honour of scoring their 3,000th league goal on 14 January 1990, Marina finished his 15-year career with spells with RCD Mallorca and CD Toledo (the latter in the second division), retiring at the age of nearly 34. He began a manager career soon after, starting with his last team then moving to CD Ourense, always as an assistant; he subsequently returned to Atlético, being charged with the youth sides and the C-team in the fourth level.
Marina returned to assistant manager duties under his mentor as a player at Atlético Luis Aragonés, which brought him to the staff in 2001. After two seasons he aided another coach, José Murcia, at Atlético B, continuing to work with the latter in the following years.
- Copa del Rey: 1984–85; Runner-up 1986–87
- Supercopa de España: 1985
- UEFA Cup Winners' Cup: Runner-up 1985–86
- European Competitions 1985–86; at RSSSF
- "Marcó el gol 3.000 de los rojiblancos en la Liga" [Scored the red-and-white's 3.000th League goal] (PDF). Mundo Deportivo (in Spanish). 16 December 2004. Retrieved 19 May 2017.
- "Ezaki y Serra, las estrellas" [Ezaki and Serra, the stars] (PDF). Mundo Deportivo (in Spanish). 9 August 1990. Retrieved 19 May 2017.
- "Aragonés, el inventor de La Roja" [Aragonés, the inventor of La Roja]. El País (in Spanish). 5 December 2013. Retrieved 19 May 2017.
- "Pepe Murcia y Marina se van a entrenar a Finlandia" [Pepe Murcia and Marina go to Finland to coach]. Mundo Deportivo (in Spanish). 24 June 2016. Retrieved 19 May 2017.
- "0–0: Más que ensayo una "pachanga"" [0–0: More than a rehearsal a pick-up game]. Mundo Deportivo (in Spanish). 27 May 1985. Retrieved 19 May 2017.
- "El Mallorca, finalista elemplar" [Mallorca, the perfect finalist]. Mundo Deportivo (in Spanish). 30 June 1991. Retrieved 19 May 2017.