The damage was already done by the time right guard Kevin Zeitler found out just how bad it got for the Giants offensive line Sunday.

In a 27-21 loss to the Cardinals at MetLife Stadium, the Giants gave up eight sacks.

“Oh God, really?” Zeitler said. “I had no clue.”

That was eight sacks, or six fewer than the Cardinals had recorded in their first six games combined. That was eight sacks, or four fewer than the Giants had given up in the first six games combined.

Daniel Jones, who had to absorb those eight sacks — three of which caused fumbles — and four more quarterback hits, may have had a better feel for the beating he took, but shouldered the blame instead.

“They have some good pass rushers over there and they did a good job,” Jones said. “But I need to do a better job of getting rid of the ball, getting through my reads and getting the ball out.”

Jones’ linemen hardly did him any favors.

The Giants had two chances to put together a game-winning drive in the final five minutes and failed on both, in large part because of four sacks on their final 11 plays. There was no sack on the 11th play, but Jones was still drilled in the end zone as he got off a prayer that went unanswered.

“That’s a tough situation,” left tackle Nate Solder said. “That’s when we gotta be at our best. We gotta be perfect up-front. We know we’re throwing, they know we’re throwing and we gotta be able to protect the QB so he can get the ball out.”

Chandler Jones wreaked havoc in particular, racking up four sacks — after entering the game with 4.5 on the season — including one where he got to Daniel Jones untouched.

“It won’t happen again,” said Will Hernandez, who also had an ill-timed holding penalty that wiped out a 37-yard Saquon Barkley run late in the second quarter that would have put the Giants in the red zone. Instead, they later punted.

The Cardinals entered Sunday as a bottom-five defense in the NFL in most categories, but left feeling good about themselves. The Giants’ revamped offensive line, meanwhile, had shown improvement but took a step back in brutal fashion.

“It obviously just sucks, straight up,” Zeitler said. “That’s as plain and blunt as you can be. It sucked today.”

For more on the Giants’ Week 7 loss to the Cardinals, listen to this episode of the Giants podcast, “Blue Rush”: