Unai Marrero

Born in San Sebastián, Gipuzkoa, Basque Country, Marrero joined Real Sociedad's youth setup in 2016, from CD Lagun Onak. He made his senior debut with the C-team on 14 September 2019, starting in a 1–2 Tercera División away loss against Pasaia KE. Marrero made his professional debut with the reserves on 10 October 2021, coming on as a first-half substitute for outfield player Jon Karrikaburu as Andoni Zubiaurre was sent-off in a 1–1 home draw against SD Ponferradina in the Segunda División. He was definitely promoted to the B's ahead of the 2022–23 Primera Federación, and renewed his contract until 2027 on 12 July 2023. On 2 January 2024, Unai made his debut in a La Liga match against Deportivo Alavés, which was played at the Estadio de Anoeta and ended in a 1–1 draw.

Marrero was called up to the Basque Country national team for a friendly match against Palestine on 15 November 2025.

As of match played 17 September 2026

Real Sociedad

Copa del Rey: 2025–26