Skysports.com understands Preston are in talks to sign former Burnley defender Steven Caldwell.
Caldwell is looking for a new club after leaving Burnley at the end of last season.
Portsmouth have been linked with a bid for Caldwell, but Preston are hoping to persuade him to make the move to Deepdale.
Preston boss Darren Ferguson is keen to reshape his squad for the start of the new season and he sees Caldwell's experience as a key addition to his side.
Former Newcastle and Sunderland defender Caldwell is expected to make a decision on his future in the next few days with Preston hopeful he will become their latest summer signing.