For no fewer than 13 players in the first-team squad are entering the final year of their current contracts on Wearside. Jon McLaughlin has already spoken of his desire for a new deal, but who else will be hoping to earn fresh terms with the Black Cats? Scroll down and click through the pages to see all the players facing an uncertain future:
5. Luke O'Nien
Midfielder-turned-wing-back O'Nien agreed a two-year contract when he joined the Black Cats - meaning he will be out of contract next summer. Photo: FRANK REID
6. Benji Kimpioka
The enigmatic youngster entered contract discussions earlier this year, but is yet to put pen to paper on extended terms at the Stadium of Light. Photo: FRANK REID
7. Dylan McGeouch
A one-year extension was triggered this summer, meaning the Scottish midfielder will remain at the Stadium of Light until at least the summer of 2020. Photo: FRANK REID 2019
8. Jack Bainbridge
The young centre back has been in and around the first-team squad during pre-season - but sees his contract on Wearside expire next summer. Photo: FRANK REID