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.
1. Oli McBurnie
Reports have suggested talks over a deal have taken place but there has been no announcement regarding the signing of fresh terms. Photo: Alex Livesey/Getty Images
2. Jayden Bogle
Bogle has been a regular fixture for the Blades this season but his contract is reportedly up in the summer. Photo: Catherine Ivill/Getty Images
3. George Baldock
Chris Wilder has said there is thinking and talking to do when it comes to Baldock's future. Photo: Laurence Griffiths/Getty Images
4. John Egan
The defender has not made a Premier League appearance since September due to injury. Photo: Ross Kinnaird/Getty Images