He made his professional debut on 20 September 2006 at the age of 18, coming on as a second-half substitute in a 1–2 home loss against Deportivo Alavés in the second round of the Copa del Rey,[1] but spent the vast majority of his early spell with the reserves, also being loaned to lowly UE Lleida.

[3] He played 23 games during the season – albeit only seven starts – as the club was immediately relegated; his first match in the competition was on 29 August 2009, when he came off the bench in a 1–0 defeat at Real Zaragoza.

[4] Prior to being released in June 2012, Omar was loaned to Segunda División teams UD Almería[5] and SD Huesca.

[7] In his debut campaign with the Castile and León side, Omar was regularly played by manager Miroslav Đukić,[8] scoring his only goal in the Spanish top division on 1 June 2013 in a 4–2 away loss against RCD Mallorca.

[18] Omar won his only cap for the Spain under-21 team on 17 November 2009, playing the final 16 minutes in a 2–1 away loss to the Netherlands for the 2011 UEFA European Championship qualifiers.