Randy Moss is the latest to enroll in Bill Belichick’s career rehabilitation clinic in New England. The Jets will be the first to find out how quickly Moss has adapted when they play the Patriots in the season opener.

But it’s nothing that should keep Eric Mangini from sleeping the next few months. Belichick is the one who just acquired a tremendous headache. The Patriots are not getting the Moss that dominated the league his first six seasons. He wasn’t much of a factor his final year with the Vikings in 2004, then disappeared into the Black Hole for two seasons in Oakland.

This trade Sunday is good news for the Jets. If anybody can poison the Patriots’ all-for-one locker room, it’s Moss.

The Patriots are counting on Moss not only buying into this being his best chance at the Super Bowl because he gets to play with Tom Brady, but his last chance to salvage a career that once seemed destined for the Hall of Fame.

“He’s not Randy anymore,” one GM said Sunday. “I think he’s lost a step. To me, he’s also lost his love of the game. I don’t see it anymore. Maybe it’s the Raiders who pulled it out of him. It’s not the same Randy unless they totally reinvigorate him.”

Belichick willingly fell into the same trap Bill Parcells was pushed into by Jerry Jones last year when Dallas signed T.O. They all think they can handle the malcontents. How did that one work out for Parcells? He’s retired and living in Saratoga. Maybe Belichick’s wild ride through free agency is an indication he’s just loading up for one last run at the ring.

Just in case Belichick and Brady intimidate Moss into giving anything close to full effort, the Jets made a preemptive strike Saturday when they traded up in the first round to get Darrelle Revis, the best cover corner in the draft. But they did that before news of Moss-to-the-Patriots broke.

Belichick gave up next to nothing, a fourth-round pick, to take a chance Moss has something left – and wants to give it. Moss, once the NFL’s most feared offensive player, had no market value. Al Davis gave him away to remove any opportunity Moss had to sabotage rookie coach Lane Kiffin, who at 31 is just one year older than Moss. Last year, Moss had career lows in catches (42), yards (553) and touchdowns (three). Of course, he played without a quarterback.

“I think (the Patriots’) record and what they’re about speaks massive volumes,” Moss said Sunday. “I’m just very happy to find some happiness and get back to what I love to do, which is play football and go out there and compete.”

Moss was due to make $9.75 million in 2007. He restructured his deal, and one GM speculated that Belichick loaded it up with out-clauses in the event Moss misbehaves. Belichick took on Corey Dillon, and it worked. Moss is the ultimate challenge: Me-first player in team-first locker room.

“I think that Randy is coming here as a player that is competitive, wants to win, can produce and help our football team,” Belichick said.

How will Belichick and Brady react if Moss ever says, “I play when I want to play. Do I play up to my top performance, my ability, every time? Maybe not,” like he did once did in Minnesota. And how will Pats owner Robert Kraft feel if Moss fakes pulling down his pants to moon the crowd at Giants Stadium, like he did in Green Bay?

“He has been humbled,” said one GM who endorsed the trade. “He’s not 23 years old anymore. You have to think he’s grown up. He’s done hard time in Oakland, and now he’s out.”

He’s enrolled in the Belichick school. Let’s see if he flunks out.