The 28-year-old central defender has signed a three-year deal at the Stadium of Light after travelling south for talks and a medical, and has admitted the chance to test himself in the Barclays Premier League proved too much for the Dons skipper to resist.
He said: "I am hugely excited. It´s a big club going places and it´s exciting times to be coming here, so I am certainly looking forward to the challenge ahead."
© Copyright PA Sport Ltd 2007, All Rights Reserved.
Do YOU want to write for GiveMeSport? Get started today by signing-up and submitting an article HERE: http://gms.to/writeforgms