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 18-year-old Swede is moving 30 miles from Goodison Park to Edgeley Park for one month in the hope of gaining some first team experience.
And this could materialise as early as Tuesday when County host Lincoln City in the Blue Square Premier.
Hammar, who has represented Sweden at under-19 level, moved to the Toffees from Malmo in the summer of 2010.