The Black Cats have been linked with a deal to re-sign former loanee Dion Sanderson.
The defender excelled over the course of his short spell with the Black Cats under the stewardship of then-manager Lee Johnson during the 2020-21 season.
Sunderland may face competition with Championship Sheffield United also said to be interested.
Lynden Gooch, Patrick Roberts and Bailey Wright are all considering new contracts at the Stadium of Light but there has been no word on their final decisions yet.
How could Sunderland’s matchday squad potentially look given if current transfer rumours and contract talks turn out to be true?
Sunderland may face competition with Championship Sheffield United also said to be interested.
5. CB: Dion Sanderson
The defender has been linked with a return to Sunderland. Photo: Jacques Feeney
6. CM: Luke O'Nien
Luke O'Nien will appear for Sunderland in the Championship during his fifth season with the club. Photo: Nathan Stirk
7. CM: Elliot Embleton
Another player who can make the step up for Sunderland from League One to the Championship. Photo: FRANK REID PHOTOGRAPHER 2022
8. LW: Josh Murphy
Sunderland have been credited with an interest in winger Josh Murphy from Cardiff City with the former Norwich City player set to become a free agent after spending last season on loan at Preston North End. Photo: Alex Burstow