But who could the Sunderland owner now turn to? With a number of managers - both experienced and fairly youthful - available for hire, Donald will likely have no shortage of suitors for the vacant role – which is still an appealing one. Here’s 13 managers that Sunderland could line-up to fill the void at the Stadium of Light, with some familiar faces potentially in the frame:
13. NIGEL PEARSON
His ‘old school’ nature may not please Sunderland fans, but Pearson knows how to get results - and he could see Sunderland as an ideal route back into the game. Photo: Jack Thomas
14. JOHN O'SHEA
At the other end of the scale, O’Shea is just starting his career as a coach - but Sunderland could prove a fine education in management for the former centre back. Photo: Alex Burstow
15. KEVIN PHILLIPS
The ex-Sunderland striker was linked with the Black Cats last summer, and reportedly wants the job again this time. He’d no doubt be a popular appointment! Photo: Nathan Stirk