Mamadou Traoré, a winger from Mali, has returned to Castellón following a loan period last season. He has rejoined Castellón on a free transfer, with Royale Union Saint-Gilloise keeping a percentage of any future sale proceeds. Traoré has signed a contract that extends until June 30, 2028. This season, his involvement in the Belgian First Division was limited, as he played only 20 minutes, which made his transfer easier. In the previous season, he participated in 11 league matches and two Copa del Rey matches for Castellón, where he made a positive impact despite not being a regular starter. His development was affected by an injury in the latter part of the season.