The signing was met with a conjunction. The Giants needed Olivier Vernon, but …

But at five years and $85 million — with $52.5 million guaranteed — without a Pro Bowl on his résumé, many complained the Giants overpaid. Those same doubters emerged when he got off to a slow start, one sack in seven games, surely limited by a broken hand he never complained about.

The new Giants defensive end, mixing a rare combination of power and speed, isn’t a talker. He’s consistent and workmanlike. He doesn’t give many sound bites.

“I just love his demeanor. He’s quiet, super-reserved,” Victor Cruz said Tuesday. “Kind of the quiet assassin is what I like to call him. He’s been a tremendous player for us.”

While his numbers through 10 games — 41 tackles, four sacks, a forced fumble, 10 tackles for losses and nine quarterback hits — may not fly off the page, his impact has been obvious, particularly recently. Pro Football Focus ranks Vernon 13th among all edge rushers, and he has notched sacks in the last three games.

It’s no coincidence the Giants’ defense is much more stout than a year ago now that it has added a player of the 26-year-old Vernon’s ilk, along with tackle Damon “Snacks” Harrison and cornerback Janoris Jenkins. The unit was last in the league in total defense a year ago, 16th this season; 24th against the run a year ago, seventh now.

“He’s one of the most dominant run stoppers I’ve seen at the defensive-end position,” linebacker Devon Kennard said. “Watching some of the film, [what] he can do to tight ends and tackles is impressive.