As preposterous as it now sounds it was only last week that people were asking each other “Where were you when you heard about Tom Brady’s injury?”

Turned out to be a minor knee sprain and it didn’t stop Brady from lighting up the Tampa Bay Buccaneers a couple of days later in the Patriots’ second preseason game.

But the Brady “injury” remains interesting in this respect: Aside from coach Bill Belichick’s first press conference of training camp it’s the only time all summer that any real “noise” has wafted over Gillette Stadium.

And by “noise” we aren’t talking about the cheers and boos from the stands or the grunts and groans from the practice field. We’re talking about back-page headlines. We’re talking “bulletin-board material” which is usually the fallout from some (generally younger) player making a dismissive comment about the next team on the schedule.

Belichick hates this kind of noise. In his view it’s unnecessary and gets in the way of preparing a team to play football. It’s flat out bad for business is what it is and that’s why rookies have a way of strangely disappearing for a week or so after being a tad too loquacious with the writers.

I vividly remember this happening once with former cornerback Ellis Hobbs. He talked too much too soon.

Poof. Gone for a couple of days.

I also believe it’s one of the reasons why Wes Welker is no longer with the Patriots. The receiver’s infamous “foot” jokes directed at New York Jets coach Rex Ryan so veered from the playbook that I bet memories of that episode still rankle Belichick.

It’s all the more amazing then that Belichick has been able to keep the circus out of the town as he whips the Pats into shape for the upcoming season. From the moment one of his best-known players was linked to a murder investigation it was more or less understood that this would be a training camp like no other that it would be full of live shots helicopters and aggressive questioning about what Belichick knew and when did he know it?

But Belichick devoted his first media availability of camp to baring his soul about former tight end Aaron Hernandez. Belichick was as candid and at times emotional as he’s ever been in front of the cameras and the session didn’t end until everyone had run out of questions.

And now when Hernandez makes news — such as this latest bit about jailhouse scribblings in which he worries about not being around for his young child — it’s a news story not a sports story.

The assumption was that this would be the craziest loudest Patriots training camp in history. Instead it has been one of the calmest.