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:
13. Plymouth Argyle
Alex Fletcher, Joel Grant, Tafari Moore, Michael Peck, Tom Purrington, Ryan Taylor Photo: Dan Mullan
14. Rochdale
Josh Lillis, Ryan McLaughlin, MJ Williams, Calvin Andrew, Callum Camps, Aaron Wilbraham, Matty Gillam, Ian Henderson Photo: Charlotte Tattersall
15. Shrewsbury Town
Romain Vincelot, Joe Murphy, Lifumpa Mwandwe, Kian Taylor Photo: Gareth Copley
16. Sunderland AFC
Tommy Smith, Kyle Lafferty, Ethan Robson, Joel Lynch, Duncan Watmore, Alim Ozturk, Jack Baldwin Photo: Clive Brunskill