Upson has been left out in the cold of late, the last five games have seen him not even able to get a place on the bench, which is why other clubs have been interested, including Chinese outfit Shanghai Shenhua.
But Potters boss Pulis says that there was also a few phone calls from interested clubs who wanted to take the ex-England defender on loan during the January window, but Pulis resisted.
As far as the Welshman is concerned, Upson can still play a major roll for the Potters.
He told the Sentinel: "Matty had the opportunity to go out on loan during the window and we turned that down.
"One or two clubs wanted to take him on loan - there wasn't a permanent deal on the table for Matty."
When asked if Upson had been frustrated by his lack of match action, Pulis answered: "Yes, and rightly so, but he's a good lad."