Joan Oleaga Arregi (born 7 March 2006) is a Spanish footballer who plays as a midfielder for Real Sociedad B.
Club career Born in San Sebastián, Gipuzkoa, Basque Country, Oleaga joined Real Sociedad's youth sides in June 2018, from . He made his senior debut with the C-team on 8 September 2024, coming on as a late substitute in a 3–1 Segunda Federación home loss to SD Ejea.
Oleaga scored his first senior goal on 1 December 2024, netting the C's second in a 2–1 away win over Deportivo Aragón. He made his professional debut with the reserves on 10 January 2026, replacing Ibai Aguirre late into a 0–0 Segunda División home draw against Albacete Balompié.
International career On 18 February 2025, Oleaga was called up to the Spain national under-19 team for two friendlies against Norway. He made his debut for the side nine days later, starting in a 1–0 loss.
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