Hatters defender Johnny Mullins is being tracked by Doncaster and Plymouth according to Sky Sports.
The former Mansfield man has impressed since his move to Edgeley Park in the summer of 2008 and has already been linked with a move to the Championship this month.
According to the article both clubs want to bolster their defences and are considering placing a bid for the 24-year-old who came through the ranks at Reading.
