Officially the pair will formally leave the club when their contracts expire at the end of next month after the Black Cats decided not to offer either a new deal.
But as they are currently on holiday, there will be no return to SOL for the two defenders.
Paolo Di Canio's retained list does not include loan signings Danny Rose and Kader Mangane, who have returned to their respective clubs, while Ahmed Elmohamady and Ji Dong-won are back on Wearside after temporary spells at Hull and Augsburg respectively.