"I am very excited about the move. I didn't manage to force my way into Bryan Robson's plans at West Brom, but once I had an offer on the table from Sunderland, I didn't need to think about it," he said.
"Sunderland is a huge club with a passionate set of fans and although I will have some stern competition from the other goalkeepers here, I know the experience will make me a better player.
"I really enjoyed getting some first-team football under my belt at Walsall last season, hopefully I can force my way into Mick McCarthy's ideas once the season gets underway."