Sky Sports understands a number of clubs are tracking highly-rated Carlisle United midfielder Brad Potts.
Sheffield United are planning to send Andy Butler back out on loan after seeing an agreement with Walsall collapse.
The 21-year-old has scored three times in six appearances for the Shrews and will now stay with the Greenhous Meadow outfit until the end of their League One campaign on Saturday April 27.
Wanderers have the option to recall the forward at 24 hours' notice.
The former Oldham trainee scored seven goals in 17 games for League Two side Bristol Rovers earlier in the campaign.