And Sunderland have much work to do following the club’s retained list.
Goalkeeper Lee Burge remains on Wearside but Remi Matthews was not offered a new deal.
That means the Black Cats will be in the market for a new stopper.
Here, we take a look at the free agent and loan options available to Lee Johnson.
1. Jordan Archer
Middlesbrough recently released goalkeeper Jordan Archer meaning that the 28-year-old Scotland international stopper is now available on a free transfer. Photo: Stu Forster
2. Julian Schwarzer
Son of former Middlesbrough stopper Mark Schwarzer, Julian Schwarzer is available on a free transfer this summer and could provide a backup option for Sunderland. Photo: Pool
3. Daniel Iverson
The Leicester City stopper could prove an interesting option on loan. However, Iverson spent last season on loan at Preston and the Championship club are said to be interested in capturing his signature again. Photo: Stu Forster
4. Frank Fielding
The 33-year-old former England youth international stopper is available for nothing this summer following his release from Millwall. Fielding was also at Bristol City for a long stint under current Sunderland head coach Lee Johnson. Photo: Stephen Pond