Born in
Aravaca,
Community of Madrid, Sanz began his career with hometown side
Aravaca CF before joining
Getafe CF's youth sides in 2019. In 2022, he moved to
UD Almería and was assigned to the
Juvenil A squad. Promoted to
the reserves in
Tercera Federación ahead of the
2023–24 season, Sanz made his senior debut on 10 September 2023, starting in a 0–0 away draw against
Atlético Malagueño. He scored his first senior goal the following 7 January, netting the B's fifth in a 6–0 home routing of
FC Málaga City. Sanz made his first team – and
La Liga – debut on 25 May 2024, coming on as a second-half
substitute for
Aleksandar Radovanović in a 6–1 home routing of
Cádiz CF, as both sides were
already relegated. He would feature exclusively with the B's
the following season, now in
Segunda Federación. On 20 July 2025, Sanz signed a four-year contract with
Deportivo Alavés, being initially assigned to
the B-team also in the fourth division. ==Personal life==