Martín scored his first senior goal on 1 November 2017, netting the equalizer in a 1–1 home draw against Real Balompédica Linense. The following 21 June, after featuring regularly for the B-team during the campaign, he extended his contract with the club,[1] and featured with the main squad during the whole pre-season.
Martín made his top tier debut on 15 August 2021, replacing Óscar Valentín in a 0–3 away loss against Sevilla FC. The following 27 January, after featuring rarely, he was loaned to CD Tenerife in division two, until June.[5]
Back to Rayo for the 2022–23 season, Martín again featured rarely, and was loaned to second division side Racing de Santander on 31 August 2023.[6] The following 2 August, he signed a permanent four-year deal with the Verdiblancos.[7]