| Josín | |
| Full Name: | José Antonio Martínez Álvarez |
| Birth Date: | 29 July 1997 |
| Birth Place: | Oviedo, Spain |
| Height: | 1.80m |
| Position: | Centre back |
| Currentclub: | Avilés Industrial |
| Clubnumber: | 22 |
| Youthclubs1: | Oviedo |
| Years1: | 2015–2020 |
| Caps1: | 110 |
| Goals1: | 3 |
| Years2: | 2016–2019 |
| Caps2: | 1 |
| Goals2: | 0 |
| Years3: | 2020–2021 |
| Caps3: | 21 |
| Goals3: | 0 |
| Years4: | 2021–2023 |
| Caps4: | 56 |
| Goals4: | 0 |
| Years5: | 2023–2024 |
| Caps5: | 20 |
| Goals5: | 0 |
| Years6: | 2024– |
| Caps6: | 6 |
| Goals6: | 0 |
| Club-Update: | 12 October 2024 |
José Antonio Martínez Álvarez (born 29 July 1997), commonly known as Josín, is a Spanish footballer who plays for Avilés Industrial as a central defender.
Born in Oviedo, Asturias, Josín was a Real Oviedo youth graduate. He made his senior debut with the reserves on 10 May 2015, aged only 17, starting in a 1–0 away win against Atlético de Lugones SD in the Tercera División.
Despite being still registered with the Juvenil squad, Josín was called up to the first team for a Segunda División match against UE Llagostera on 6 May 2016.[1] He only made his professional debut on 4 June, coming on as a second-half substitute for Josete in a 0–5 away loss against CA Osasuna; he was also sent off after one minute on the field after conceding a penalty.[2]
Josín scored his first senior goal on 17 September 2016, netting the game's only in a home success over CD Tineo.