Piast Gliwice announced on July 11, 2026, that Marcel Mendes-Dudziński has signed a three-year contract with the club. Mendes-Dudziński recently left Legia Warszawa and spent the last six months on loan at Świt Szczecin. According to 'Wojskowi', the contract with Legia Warszawa was terminated by mutual agreement.

According to Tomasz Włodarczyk from Meczyki.pl, Marcel Mendes-Dudziński's contract with Legia Warszawa, which was supposed to last two more years, will be terminated early. Piast Gliwice has approached the goalkeeper, and an agreement for the move seems to be in place. The move will give him a chance to play in a new environment.

Marcel Mendes-Dudziński, whose contract with Legia Warszawa is valid until the end of May 2028, is on trial at Piast Gliwice. The trial comes as Legia seeks to move the 21-year-old goalkeeper after he was unable to secure a position in the first team. Tomasz Włodarczyk from Meczyki.pl reports that Mendes-Dudziński will begin preparations for the season with Piast, a league competitor to Legia, under coach Daniel Myśliwiec. According to the same source, if he performs well in the initial training sessions, he will likely be given an opportunity to demonstrate his abilities at the club.