Jason Steele has signed a three-year contract at Brighton & Hove Albion - with the Seagulls landing him on a free transfer.
The Black Cats were keen to get Steele's wages off the books as they look to rebuild the squad, with owner Stewart Donald hopeful of completing deals for four players in the coming days.
Sunderland are aiming to have up to half a dozen new faces in before the Sunderland squad returns for pre-season training next week ahead of the pre-season training camp in Portugal.
The Echo exclusively revealed earlier this week that Sunderland had agreed a deal with a Premier League club for Steele, with Brighton taking the Sunderland stopper to the south coast.
Steele was signed from Blackburn Rovers for a fee of £500,000 last summer but struggled as Sunderland were relegated from the Championship.
Steele, Robbin Ruiter and loanee Lee Camp all struggled badly between the sticks for Sunderland last season.