However, manager Kevin Blackwell has confirmed the club have set up a deal to finalise the move when the transfer window re-opens.
"Everything looks like it's been done with Cressy," he told the Sheffield Star. "We've been talking with Stoke for a while and we've come to an arrangement about how much we'll be paying.
"Cressy is a brave lad and a very experienced player who we were pleased to get in the first place. He's seen everything in the game and is very valuable to us."
Coca Cola Ch'ship Promotion 09/10 Win Outright: Sheff Utd 6/1