The Wearsiders are now on the hunt for a new manager after the Scotsman informed them of his decision to walk away in a meeting on Monday
David Moyes has resigned as manager of Sunderland after failing to prevent relegation from the Premier League this season.
The former Everton and Manchester United coach had been an unpopular figure on Wearside since taking over last summer and the club finished bottom of the English top flight, 16 points from safety.
Moyes informed Black Cats owner Ellis Short of his intention to leave the post at a meeting in London on Monday, a day after Sunderland's dismal Premier League season came to a fitting end with a 5-1 thrashing at champions Chelsea.