UB Conquense
Martínez was born in Tarancón, Province of Cuenca. During his career, spent mainly in the third division, he played for hometown's Albacete Balompié, AD Ceuta, UB Conquense, Real Oviedo and CD Quintanar del Rey. In the 2006–07 season the 19-year-old appeared in 13 Segunda División games for the first club, in an eventual sixth-place finish.