The Blades returned to the top flight last season, although have found life back in the Premier League tough. Paul Heckingbottom paid the price for a slow start with his job but his replacement, Chris Wilder, has not been able to ease relegation fears.
With nine games left to play, the Blades currently sit rock-bottom of the league with a tally of 15 points. They are seven points adrift of Nottingham Forest, who sit just above the bottom three in 17th.
Wilder has made no secret of how crucial this summer will be for the club and reports have suggested a key appointment has been made in the recruitment department.
With the end of the season approaching, The Yorkshire Post has taken a look at 19 players who are reportedly out of contract in the summer and could depart Bramall Lane.
9. Cameron Archer
Aston Villa are contractually obliged to sign Archer back from Sheffield United if the Blades are relegated, according to reports. Photo: Marc Atkins/Getty Images
10. Ben Osborn
The midfielder has admitted he is unsure about his Sheffield United future. Photo: Alex Livesey/Getty Images
11. Mason Holgate
Holgate joined Sheffield United on a season-long loan deal from Everton last summer. Photo: Catherine Ivill/Getty Images
12. Chris Basham
The stalwart is a long-term absentee having picked up a horrific injury earlier on in the season. Photo: Laurence Griffiths/Getty Images