Southampton striker Sam Gallagher is being considered by Aston Villa, Sunderland, Wolves and Cardiff City.
The 21-year-old has impressed on loan at Blackburn Rovers despite the Ewood Park club battling relegation to League One.
The England U20 international was signed by Owen Coyle and has proved one of the few highlights of another poor season.
Gallagher, who is 6ft 4ins tall, has scored 12 goals this season including a vital one against rivals Bristol City last Monday where he was watched by Sunderland manager David Moyes.