Full-back Rick Karsdorp is one of several interesting players available to be signed immediately as a free agent, even though the transfer window has closed. Both West Ham United and Crystal Palace are clubs that could potentially sign players from the free agent market. West Ham's new manager, Nuno Espirito Santo, may welcome additions to his squad after a poor start to the season, while Crystal Palace might need reinforcements for their demanding schedule due to their participation in the UEFA Conference League.