The Black Cats have seen plenty of players leave too, including stalwart Lee Cattermole and high earners Bryan Oviedo and Donald Love. Here, we round-up every deal the North East club has concluded during the summer. Scroll down and click through the pages to see the full list.
9. OUT: Max Stryjek
The 23-year-old Polish stopper joined Eastleigh after hos Stadium of Light contract expired. Photo: Stephen Pond
10. IN: Joel Lynch
A free signing after his contract at QPR expired. Photo: Warren Little
11. OUT: Lee Cattermole
The club reached a settlement agreement with the former captain, who joined VVV-Venlo in Holland. Photo: Charlie Crowhurst
12. OUT: Glenn Loovens
The defender wanted to stay at Sunderland in some capacity, but player and club came to an agreement to part ways. Photo: Naomi Baker