|Full name||Omar Mascarell González|
|Date of birth||2 February 1993|
|Place of birth||Santa Cruz de Tenerife, Spain|
|Height||1.80 m (5 ft 11 in)|
|Playing position||Defensive midfielder|
|2011–2014||Real Madrid B||76||(8)|
|2012–2013||Real Madrid C||21||(2)|
|2014–2015||→ Derby County (loan)||23||(0)|
|2015–2016||→ Sporting Gijón (loan)||26||(0)|
* Senior club appearances and goals counted for the domestic league only and correct as of 16 October 2016.
Born in Santa Cruz de Tenerife, Canary Islands, Mascarell joined Real Madrid's youth system at the age of 17, arriving from local CD Laguna de Tenerife. On 21 August 2011 he made his debut as a senior, playing with Real Madrid Castilla against Sporting de Gijón B for the Segunda División B championship; he contributed with 24 games during the season (11 starts) as the B's returned to Segunda División after an absence of five years, scoring twice in the process.
Mascarell started the 2012–13 campaign with the C-team also in the third level, but was promoted back to the reserves after only a couple of weeks. He played his first professional match on 28 October 2012, coming on as a substitute for Pedro Mosquera for the last 17 minutes of a 2–4 home loss to Sporting de Gijón.
On 6 August of the following year, he joined English club Derby County on a season-long loan. He made his debut five days later, substituting Will Hughes in the 53rd minute of a 1–0 success over Rotherham United at Pride Park Stadium. He went on to make 23 appearances for the Rams and captured the hearts of thousands of fans, despite fierce competition from the skilled John Eustace. His most notable accolades during his loan spell were two assists and running the game against Wolverhampton Wanderers in a 5-0 victory and the chant "When Thorne's not well, Give us Mascarell" to the tune of "Gives You Hell" by The All American Rejects.
Mascarell has origins in Equatorial Guinea on the paternal side. In May 2012, he was called by the national team of that country for the 2014 FIFA World Cup qualifiers against Tunisia and Sierra Leone. He travelled to Malabo, but nonetheless declined to play in any of the two matches because he had already represented Spain at youth level and did not want to give up on that option; according to the local press, Federación Ecuatoguineana de Fútbol was completing the administrative procedures of his eligibility.
- Real Madrid Castilla 1–0 Sporting B; RFEF, 21 August 2011 (Spanish)
- Continúa el 'Efecto Sandoval' ('Sandoval Effect' continues); Marca, 28 October 2012 (Spanish)
- "Mourinho bows out with win". ESPN FC. 1 June 2013. Retrieved 1 June 2013.
- "Derby County sign Omar Mascarell on loan from Real Madrid". Derby County F.C. 6 August 2014. Retrieved 6 August 2014.
- "Derby 1–0 Rotherham". BBC Sport. 9 August 2014. Retrieved 24 January 2015.
- "Omar Mascarell, primer refuerzo del Sporting" [Omar Mascarell, first addition of Sporting] (in Spanish). Marca. 3 August 2015. Retrieved 3 August 2015.
- "Eintracht Frankfurt verpflichtet Omar Mascarell" [Eintracht Frankfurt acquires Omar Mascarell]. Eintracht Frankfurt. 6 July 2016. Retrieved 16 July 2016.
- Cargando las pilas (Charging batteries); Club Balonmano Tejina, 5 June 2012 (Spanish)
- The National Nzalang begins the journey to Brazil 2014 with a match against Tunisia; Guinea Ecuatorial Press, 2 June 2012