Sunderland: Wales defender Adam Matthews among four players released
Wales right-back Adam Matthews is among four players released by Sunderland.
Matthews, 27, leaves after making more than 50 appearances since a £2m move from Scottish giants Celtic in 2015, 28 of them in 2018-19.
Dutch keeper Robbin Ruiter, who played seven games last season, has also been released along with Polish stopper Max Stryjek and winger Luke Molyneux.
The Black Cats will spend a second successive season in League One after losing the play-off final to Charlton.