[2] Martínez started his career with San Lorenzo in 2009, making his professional debut on 3 April in an Argentine Primera División match with Arsenal de Sarandí.
[2] He returned to San Lorenzo in 2012 and subsequently made two more appearances, prior to leaving permanently to sign for Primera B Nacional's Aldosivi in 2013.
[2] In June 2014, Martínez joined Argentine Primera División side Defensa y Justicia.
[6] Three years later, after scoring once in fifty-five matches for the club, he left Defensa y Justicia to play for fellow top-flight team Independiente.
[9] Martínez won twelve caps and scored one goal, versus Paraguay, for the Argentina U17 team in 2007.