Following the game, Carver admitted that his players were “poor” in the first 45 minutes of the Premier League encounter.
"We were abysmal in the first half,” the Englishman told BBC Sport. “We were poor. I always say a side of mine will give 100% and we didn’t…
"We were so negative. Every day on the training ground I am the most positive man you will ever meet, I don't put shackles on anyone I want them to be exciting but for whatever reason we were so negative out there.
“The back four is a makeshift back four and they deserve a bit of credit but the other units of the team weren't good enough.”
Over the course of the 90 minutes, Newcastle had 47% of the possession, took 10 shots of which only one was on target, and earned four corners.
In contrast, Sunderland had 53% of the possession, took 16 shots of which four were on target, and earned as many as eight corners.
The defeat at the Stadium of Light leaves Newcastle 13th in the Premier League table with 35 points from 31 matches, nine points above the relegation zone.
Newcastle are back in league action next Monday when they face Liverpool away from home at Anfield.