Born in Barcelona, Catalonia, Martínez made his senior debut with CF Badalona's reserves in Primera Catalana, and subsequently represented EF UE Cerdanyola, CE Sant Celoni [ca], UE Rubí and UDA Gramenet's B-team in the regional leagues.
In 2011, after playing for the main squad of Gramenet in Tercera División, he signed for Terrassa FC of the same tier.
[3] On 3 July 2015, Martínez signed for the reserve team of Villarreal after having scored 57 goals for Olot.
[5] On 23 July 2017, after two years with Villarreal B, Martínez moved abroad and joined Japanese J2 League club Tokyo Verdy managed by Miguel Ángel Lotina.
With Goa, Martínez made his debut on 2 October against Punjab, in which he scored the lone goal.