Sunderland have enquired about signing Óscar Mingueza, a 27-year-old former Barcelona defender who has four caps and no goals for Spain. Mingueza is available as a free agent this summer because his contract with his current club, Celta, is expiring. He joined Celta in July 2022. In the 2025/2026 LaLiga season, he made 34 appearances, scoring one goal and providing four assists. According to Transfermarkt, his current market value is €18.00m. Sunderland faces competition for the versatile defender, as Italian clubs Atalanta and Como have also enquired about a potential deal.