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.
13. Jordan Amissah
At 22, now may be the time for the goalkeeper to seek regular football away from Bramall Lane. Photo: Matt McNulty/Getty Images
14. Max Lowe
The defender has managed just three league starts for Sheffield United this season. Photo: George Wood/Getty Images
15. Yasser Larouci
Larouci's loan deal is up in the summer but the Blades have an option to make the move permanent. Photo: Matt McNulty/Getty Images
16. James McAtee
The playmaker is on loan at Sheffield United from Manchester City and his temporary deal is due to expire in the summer. Photo: Justin Setterfield/Getty Images