Eagles signed a deal at Hillsborough yesterday which will keep him at the club until December 31 and if he does not play against Mansfield tonight, he will start against Manchester City on Sunday.
But trialist Partridge, who has been released by Liverpool, will now face a wait regarding a potential future at S6.
The 24-year-old has been on trial at Wednesday and has played in the club's tour games in Scotland.
Sturrock is still talking to his agent and remains hopeful that a deal can be done despite the arrival of Eagles - who will be cover for JP McGovern who is injured.
The Owls boss though has secured the services of American full-back Frankie Simek.
The former Arsenal player has signed a three-year deal at the club after his release from Highbury.
Simek is the fifth new face at Hillsborough this summer.