NFL

Mammoth Haynesworth will test Giants’ line

Don’t worry, they all saw it.

Every member of the Giants offensive line has seen the unsettling preseason clip of Albert Haynesworth dropping his 350 pounds directly onto Tom Brady, crushing Brady into the turf the way an asteroid slams into the earth.

Brady came away wincing as he rotated his right shoulder to see if it still worked.

“Any time you see a quarterback get driven into the ground like that you know it’s going to be some sort of injury, whether it’s going to be a collarbone or shoulder,” center Shaun O’Hara said. “Believe me, our coaches have tapes set up with sacks and plays, and as much as they hurt to watch, sometimes you watch just so you can prepare.”

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Preparation is the only formula for dealing with Haynesworth, who now twice a season becomes a Giants-sized headache. The Giants face the Redskins Sunday in the regular-season debut and the most prominent — and massive — newcomer to this NFC East tussle wears No. 92, is impossible to miss and only slightly less impossible to block.

“He’s a good player, there’s no doubt about it, that’s why Washington paid him all the money,” Eli Manning said. “He’s got a lot of talent, a big guy and offensively you got to make arrangements and prepare for him. We know what we got to do and we got a game plan.”

No NFL defensive player who ever walked the planet owns a richer contract than Haynesworth, who came up huge in free agency when Washington owner Dan Snyder forked over a seven-year, $100 million package (including a record $41 million in guaranteed money) for the behemoth acclaimed as the best defensive tackle in the game.

Everyone took notice of that deal. “Absolutely, we all want that contract, believe me,” Justin Tuck said. “We’re all out there trying to work for it. He deserves it. He’s been a great player in this league for a long time. I know our offensive line wishes he was somewhere else.”

If so, they aren’t admitting it.

“We’re all grown men in here, we’re not going to be intimidated,” right guard Chris Snee said, “but we will have respect for the opponent and know what he likes to do as well as everybody else on that front.”

The offensive linemen are taking Haynesworth’s arrival in Washington personally.

“He was brought, in our eyes, to the Washington Redskins for one reason: To stop our run game,” O’Hara said. “That’s the challenge ahead of us.”

Haynesworth almost always lines up on the right side of the line, meaning the dual job of blocking him falls on O’Hara at center and Rich Seubert at left guard.

There is respect, but no awe, coming from the Giants linemen. Asked what Haynesworth looks like on the field, Seubert wouldn’t throw any bouquets.

“He looks like a D-tackle,” Seubert said. “We have D-tackles in this room too that are pretty good. It will be a good test for us as an offensive line, they’re whole D-Line is pretty solid, we know that going into this game so we have to have our heads on straight.”

There were no bouquets thrown by Haynesworth, either. Asked if O’Hara looked like a Pro Bowl center, Haynesworth said, “I guess so. They all move well. They all play well together. They all bring each other up. So that is a good thing.”

Asked why Haynesworth is so good, O’Hara swallowed hard.

“Have you seen him?” he asked. “He’s a big son-of-a-gun. For his size, he’s extremely quick and that combination is tough. There are plays where you can’t always block him with two people and trying to get him in a one-on-one matchup plays in their favor. He’s a tough man to move.”

paul.schwartz@nypost.com