Earlier this summer, the Black Cats saw an offer rejected for Dobson, with the midfielder then telling the Saddlers he wanted to leave.
And yesterday the 21-year-old completed his move to the Stadium of Light after the two clubs agreed an undisclosed fee.
But while fans will be disappointed to see their former skipper depart, they are likely to be boosted by a number of arrivals who could sign as early as today. Clarke confirmed he is still after a left-sided centre-back, with the Express & Star understanding the Saddlers have had a bid accepted for Macclesfield’s Zak Jules.
The boss also wants to sign a utility player, a winger and a striker.
“We’d like three or four through the door – maybe even we’ll get some done on Friday,” the boss said.
“I’d like another experienced boy that can play a few positions.
“A centre-forward is a must. That is a key element for me, the centre-forward. I’d like to bring in a left-footed wide player as well.
“And I’d like another left-sided centre-half because we have only got Mat Sadler who is left-footed. We have got Clarkey (James Clarke) and Dan Scarr. Kory Roberts is still a bit of time away. Leaky (Tom Leak) is a bit young and not quite ready for it.
“We need to make sure we have got plenty of cover in the right areas.”
Dobson yesterday penned a three-year-deal at Sunderland.
He said: “It’s been a long few weeks, so to finally get the deal done is a dream come true.
“I played in the same league last year, but the difference in facilities is frightening, so the opportunity to use them every day to improve my game is something I’m really looking forward to.
“I always play with pride and passion, and I can’t wait to get started.”