Tell that to Tom Brady's aching ribs, back, chest and arms and legs. Well, you get the point.
In a move that had to be considered absolutely Belichickian, Mangini used his bye week to develop a scheme that shook, rattled and rolled the New England offense by attacking at its heart in yesterday's 17-14 New York mugging.
Crowd the line with nine to clog the run and send linebackers at Brady from all angles.
"Tom Brady is one of the premier quarterbacks in this league," said linebacker Victor Hobson, who laid two of the most explosive hits that Brady's rib cage has absorbed since he got here. "We weren't going to stand there and let him pick us apart."
Mike Shanahan and the Broncos did it in Week 3, exposing the lack of any outside receiving help for Brady in a 17-7 domination.
Mangini went to school on it. Make the New England receivers beat you.
"We were expecting pressure all week and that is what we got," said a battered Brady, who ended the day on his behind - sitting dejected on the mud-caked pitch - the victim of a Shaun Ellis' game-ending strip sack.
"They weren't afraid to bring it this week. I just try to stand there as long as I can to make plays. You finally get one-on-one coverage on the outside. You try to give your receiver a chance to make a play. Those guys made plenty of plays . . . just not enough."
The quarterback of this Patriots dynasty was twisting facts like a million-dollar defense attorney.
His receivers, as depleted a lot as there is in the NFL, made tiny plays. Locking on one-on-one everywhere on the field, the Jets exposed them with reckless abandon.
The mediocre likes of Andre Dyson, Justin Miller, Erik Coleman and Kerry Rhodes were all alone on each of their individual islands, waiting to be stung.
And all the Pats could summon up were a pesky gnat in Reche Caldwell (9 catches, 90 yards) and a trio of Sand Fleas Jabbar Gaffney, Doug Gabriel, Chad Jackson and Troy Brown.
"To come out and hold them like we did was huge," said Rhodes, who spent much of the day completely eradicating underachieving Benjamin Watson from the game plan, again in one-on-one coverage.
"The pressure got to them a little bit. This was a big step. (Eric Mangini) put a lot on the secondary this week. We knew they'd come out and try to pound us first, so we came up and made the tackles. Then we just went after them."
Mangini's gamble defensively wasn't as huge as it seems. After all, he had inside information. First, there was the evidence from the Denver debacle.
"Coach brought in a great game plan and everything worked out for us," said defensive lineman Shaun Ellis. "We made up our mind and got after them."
And second, he watched first-hand the last three years as Deion Branch and David Givens made opponents pay by stretching the field and getting open deep for Brady.
Those two aren't here, a fact that reared its ugly head again here, yesterday.
Mangini had the opportunity to go a little '86 Chicago Bears on the Pats and he fired from all over the field.
"We've struggled with pressures up to now defensively, and that's why you haven't seen much of it until yesterday," said Jets' linebacker Matt Chatham, a Patriot from 2000-2005.
"That's why you haven't seen that many of them. It's something we had to earn as a defense. Now we've proven we can do it, and not hurt ourselves."
Talk about gall.
Mangini comes into his former employer's house and goes "all-in" with a weak hand.
For Patriots fans, that is not only a slap in the face, it's an ugly comment on the state of this union.
New England is floating perilously close to the pack, a spot even veteran Troy Brown has a problem explaining.
"We're 6-3, wherever that puts us in the pack, that's where we are," said Brown. "In the middle of the pack somewhere . . . At the back of the best teams . . . On top of the worst teams . . . Wherever we are that's where we are. And we're not doing too good."