Navarro said about Oso that he has an active contract and will have a first-team squad number, like Castrín. Navarro stated that the intention is to extend the contracts of both players, but he acknowledged they attract interest from other clubs and are young, so it is normal to receive offers for them.

Spanish-Argentinian left-back Oso, 22, has been mentioned as a youth player Sevilla could sell before June 30 to address the club's financial problems. It is said that all players are available for transfer. The player's contract is valid until June 2027. Strasbourg has been linked with a move for the player. Reports in May 2026 indicated that Strasbourg was interested in a potential transfer valued at an estimated €5 million, excluding bonuses. Transfermarkt estimates his market value at €5 million.