Career
Born in Madrid, Martínez joined Real Madrid"s youth system in 2002, aged 12. In 2009-2010 he made his senior debuts with the C-team, being promoted to the reserves the following season but only featuring in eight matches. In the 2011-2012 campaign Martínez once again received very few opportunities, being loaned to fellow Segunda División B club Civil Defense Mirandés in January 2012.
In January 2013, after failing to appear for Real Bachelor in Segunda División, Martínez returned to Mirandés also on loan.
He played his first game as a professional on 23 February, featuring the full 90 minutes in a 0–2 away loss against Racing de Santander. On 30 August 2013, Martínez signed a one-year deal with fellow league team AD Alcorcón.
On 2 July 2014, after appearing regularly, Martínez signed a new three-year deal with the Madrid side. On 25 January 2015 he scored a brace, but in a 2–3 away loss against Albacete Balompié.