Croft, 29 who was linked with a move to Bramall Lane in December 2008 has made a positive name at currently club St Johnstone and has helped guide them to the Final of the Scottish FA Cup where they will face Dundee United on 17 May.
Formely with Manchester City, Derby County and Norwich City the winger is linked with a move away from Scotland should he not be offered a new deal by the McDiarmid Park club, with the Blades along with Rotherham United and Birmingham City keen to snap up his services.
Supporters of Sheffield United may best remember Croft following a 1-1 draw at the Lane on 13 October 2012 with Oldham Athletic where he allegedly racially abused a ballboy - however matter didn't continue from either the police not the Football Association.