So could any of these players interest the Black Cats?
We take a look at every player released by all the clubs confirmed to be in League One for the 2020/21 season. Are they any you would like to see arrive at Sunderland? Scroll down and let us know:
1. Accrington Stanley
Dimi Evtimov, Zaine Francis-Angol, Erico de Sousa, Wilson Carvalho, Phil Edwards Photo: Nathan Stirk
2. AFC Wimbledon
Rod McDonald, Reuben Collins, Anthony Wordsworth, Mitch Pinnock, Finlay Macnab, Scott Wagstaff, Kyron Stabana, Kwesi Appiah, Tommy Wood, Dylan Connolly, Ossama Ashley Photo: Warren Little
3. Blackpool
Myles Boney, Yusifu Ceesay, Armand Gnanduillet, Sean Graham, Mark Howard, Chris Mafoumbi, Sean Scannell, Owen Watkinson Photo: Mark Robinson
4. Bristol Rovers
Tony Craig, Tareiq Holmes-Dennis, Liam Sercombe, Sam Matthews, Tom Nichols, Gavin Reilly, Ben Morgan, Josh Bailey, Lewis Clutton, Rhys Kavanagh and Theo Widdrington Photo: Alex Davidson