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Stuart Armstrong and Adam Armstrong had put the Saints into a comfortable first-half lead before Romaine Mundle and Jobe Bellingham hit back.

But Rothwell’s 73rd-minute introduction turned the momentum with two goals in three minutes to condemn Sunderland to a sixth straight defeat.

Saints boss Russell Martin said of Rothwell: “Joe is an amazing finisher. The first one looks easy but it isn’t, it is in the half volley, and then with the second he’s showed great composure.

“He was really great when he came on. Him and Joe Aribo can be frustrated that they aren’t starting but they have two guys in front of them who have been playing really well.

“It is good problems for me but they have to keep doing what they have been doing when they get on to the pitch and being frustrated at not playing.

“We should have been out of sight by half-time is my feeling. We only let them have one shot from inside the box and that hit the post and we should have made them pay for that.

“I’m delighted we have won but am furious and frustrated we have conceded two goals because it shouldn’t happen.

“Credit to Sunderland as I thought they only had 15 minutes more of energy and then they score and we weren’t clean enough and there was a bit of tension around the ground.

“But I think we deserved the win, I don’t think anyone who watched the game would say any different.”

Stuart Armstrong opened the scoring by sweeping in from a yard before Geordie Adam Armstrong converted from the spot after Ryan Manning had been downed in the box.

Mundle pulled one back in the 62nd minute from 20 yards with a strike off a post and Bellingham completed the comeback with a wonder strike after shifting on to his right foot from the edge of the area to beat a diving Gavin Bazunu.

Rothwell then claimed the three points. His first came after Adam Armstrong’s blocked cross landed perfectly for him to follow in and lash home before Adam Armstrong’s low cross was cleared off the line and into the path of the Bournemouth loanee to pounce again.

Sunderland boss Mike Dodds is still winless since taking over from Michael Beale last month and said: “The four goals are avoidable goals from my perspective.

“I want to try and spin positives about going toe-to-toe with two quality teams this week but we need to do that more consistently and get the results – that isn’t lost on me.

“I can see everyone is really trying but things aren’t going our way. It is an important moment for this group and we need to stick together.

“My confidence hasn’t taken a hit. I’m really enjoying the role. It has reinforced that I can still see the path I want to go on and still see the belief in the players.

“They have lost six on the bounce. They aren’t skipping down the corridors or high-fiving each other. But I think they can see what we are trying to do.

“I’m not going to say we deserved to win the game but for large periods we were better than Southampton.”