According to Mateusz Borek, the German club 1. FC Köln has made a concrete proposal to purchase Oskar Pietuszewski, a 17-year-old Polish winger from Jagiellonia Białystok. Borek also stated that he knew the offer was very concrete but assumes the club is unable to afford such a transfer. He further reported that two Spanish teams, Real Betis and Atlético Madryt, are making a strong effort to sign the youth international. Pietuszewski joined Jagiellonia in July 2024. This season, he has 3 goals and 2 assists in 17 Ekstraklasa appearances, and has scored 4 goals in 6 caps for the Poland U21 team. His contract is valid until June 2027, and his current market value on Transfermarkt is €12.00m. Recent reports from December 2025 indicate that Jagiellonia's asking price is between €10 million and €15 million.