The Northern Ireland striker has shown his desire to leave Deepdale by turning down a new contract with the club, and Neil Wasrnock is keen to add to his side despite the arrival of Danny Cadamarteri from Leeds United.
DAVID HEALY: FUTURE BLADE?
This is ironic as the Whites are also interested in the Irishman, but Hearly, we believe would suit a move to Bramall Lane.
Aged 20 Halford is currently at League One side Colchester United. The 6 foot 4 inch defender has played 38 games and scored 6 goals since he signed on in August 2002 and has played 14 times this season including a 3-0 victory at Wednesday.
West Bromwich Albion and Wolverhampton Wanderers are also interested in the future star.