Clarke, 31 could be allowed to leave League One rivals Bury after their manager David Flitcoft looks set to inflict a belt-tightening exercise and could allow his top striker, whom netted 18 goals last season leave Gigg Lane.
Blades boss Chris Wilder has hinted that he wishes to bring in one-more forward as part of his re-building with a new striker having a physical aspect of his game.
Wilder told the Sheffield Star: “Everybody knows that we’re looking for a powerful striker, just something a little different to what we’ve already got. There’s a list of names and, yes, some of those we’ve looked at a little bit more than others. But that’s all they are at the moment; names on a list.”
“Ideally, we’d like a big strong lad, who knows the league and has proved he can get goals in it,” Wilder added. “But, like I say, there might be some who don’t fit all of those criteria but who we think can still do the job"
As well as spells with Sheffield Wednesday and Wolverhampton Wanderers, Clarke also lists Queens Park Rangers, Swindon Town, Charlton Athletic and Coventry City amongst his previous clubs before joining Bury. He has also enjoyed loan spells with; Kidderminster Harriers, Plymouth Argyle, Oldham Athletic, Southend United, Preston North End, Chesterfield, Crawley Town, Scunthorpe United and Wigan Athletic.