Alfonso Martín Castillo
|Full name||Alfonso Martín Castillo|
|Date of birth||10 June 1994|
|Place of birth||Jerez de la Frontera, Spain|
|Height||1.82 m (6 ft 0 in)|
(on loan from Alcorcón)
|2019–2020||→ Cultural Leonesa (loan)||23||(0)|
|2020–||→ Atlético Baleares (loan)||0||(0)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 8 March 2020|
On 3 May 2013, Martín made his debut for the first team, in a 1–3 home defeat against Córdoba CF for the Segunda División championship. In August he moved to the latter, being assigned to the B-side in Segunda División B.
On 11 July 2016, Martín returned to the third level after agreeing to a contract with Real Balompédica Linense. Roughly one year later he signed for another reserve team, CD Vitoria in the same division.
On 2 August 2018, Martín signed for UD Melilla still in the third tier. The following 12 July, he agreed to a three-year contract with AD Alcorcón in the second division, but was immediately loaned to Cultural y Deportiva Leonesa for one year.
- Partido G.E. Bazán CF 0 - Xerez C.D. B 2; La Preferente, 7 January 2013 (in Spanish)
- El Xerez desciende a 2ª B en ocho minutos (Xerez is relegated to 2ª B in eight minutes; Marca, 3 May 2013 (in Spanish)
- Adri, Zafra y Alfonso, del Xerez, y Mane, primer desembarco para Puche (Adri, Zafra and Alfonso, from Xerez, and Mane, first arrivals for Puche) Archived 2014-07-08 at the Wayback Machine; Córdoba Deporte, 13 August 2013 (in Spanish)
- Alfonso militará en el grupo décimo (Alfonso will play in the group ten); ecijabpeinfo.com, 21 August 2014 (in Spanish)
- La Balompédica ficha a los sub-23 Alfonso y Rulo (Balompédica sign the under-23s Alfonso and Rulo); Europa Sur, 11 July 2016 (in Spanish)
- El joven jerezano Alfonso Martín, nuevo jugador de la SD Eibar (The young jerezano Alfonso Martín, new player of SD Eibar); Mira Jerez, 10 July 2017 (in Spanish)
- Alfonso Martín, la nueva 'roca' azulina (Alfonso Martín, the new azulina rock); UD Melilla, 2 August 2018 (in Spanish)
- "Alfonso Martín, nuevo fichaje alfarero. Será cedido la próxima temporada a la Cultural Leonesa" [Alfonso Martín, new alfarero signing. He will be loaned the following season to Cultural Leonesa] (in Spanish). AD Alcorcón. 12 July 2019. Retrieved 12 July 2019.
- "Alfonso Martín, cedido al Atlético Baleares" [Alfonso Martín, loaned to Atlético Baleares] (in Spanish). AD Alcorcón. 25 August 2020. Retrieved 25 August 2020.