The Black Cats will be looking to strengthen their squad by making new signings in the coming weeks, yet there could also be departures at the Stadium of Light.
Ellis Simms has already been recalled from his loan spell by Everton, leaving Sunderland short of options up front.
Some players are also attracting interest from other clubs, while some fringe players may be allowed to leave on loan.
We’ve taken a closer look at every Sunderland player's situation:
9. Luke O’Nien
O’Nien also had other options when his Sunderland contract expired in 2021 but opted to stay on Wearside. His current deal will run until the summer of 2024. Photo: Frank Reid
10. Bailey Wright
While he signed a new two-year contract in the summer, Wright has only started six Championship games this season. Mowbray has spoken highly of the 30-year-old, who has recently been recalled to the starting XI, yet other clubs may be looking at his situation. Photo: Frank Reid
11. Trai Hume
Recent performances have suggested Hume is ready to challenge Gooch for Sunderland’s right-back spot in the second half of the campaign. The 20-year-old signed a long-term contract when he joined the club last year. Photo: Frank Reid
12. Aji Alese
A summer signing who had to wait for his opportunity but has shown he can be an important first-team player. The 21-year-old will have competition in defence but looks like another shrewd signing after signing an initial three-year deal, with a club option of a further year. Photo: Frank Reid