There is some good news with Kevin McDonald, Chris Porter and Lee Williamson all being offered new deals with the club.
However Steve Simonsen, Andy Taylor, Johannes Ertl, Ched Evans, James Beattie, Connor Brown, Jack Adams, Seamus Conneely, Corey Gregory, Marc Warren and Shane Murray.
Meanwhile Matt Hill (Blackpool) and Michael O'Halloran (Bolton Wanderers) have returned to their parent club have completed there loan spell at Bramall Lane.