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.
Bradford have signed Derby defender Tom Naylor on loan for the next two months.
The 21-year-old, who moved to Derby last season from non-league Mansfield, has joined Phil Parkinson's side until January 12.
Naylor is expected to go straight into the Bradford squad for their home game against Exeter on Saturday.
Derby manager Nigel Clough told the club website: "This is a good chance for Tom to get some first-team games under his belt, which is something we've not been able to offer him so far this season.
"He's been playing in the under-21s regularly but first-team football is something you can't replicate so this is a chance for him to go and experience regular football for the next eight weeks or so."