The decision by DeJuan Blair to not just turn pro, but to eliminate the chance of his return has sparked plenty of debate and discussion. Much of it on the subject of, “Why?”

Please, tell me:

Where’s the harm in keeping all of your options?

“I’m guaranteed being a first-round pick,” Blair said at his news conference.

NBA scouts tell me differently.

They say — as of this moment — that Blair should be picked in the bottom half of the first round.

But they also say — quite definitively — that there is no guarantee.

Even those who agree with the mock draft projections, find themselves questioning the decision to go irrevocable.

At the very least, I see Blair making an impact in the League in the Brandon Bass/Leon Powe fashion, an energy rebounder off the bench who’s invariably more valuable to a contender than to a Lottery team.

But listed at 6-6 or 6-7, with a game that’s strictly low-post and under the glass, Blair is a lock to get drafted lower than his talent warrants. It also doesn’t help that he’s got a history of knee surgeries, and he’s struggled to keep his weight under control in the past. Eliminating the possibility of pulling his name out of the draft before teams even get to take his true measurements and test out his knees could come back to bite Blair in the end.

Then again, I can see why going all-in is the smart play. First, there’s the risk of getting injured again if Blair goes back to college. And it’s not like he’s going to grow any taller if he stays at Pitt. If Blair measures out to be 6-6 or even 6-5, another All-American campaign and constant double-doubles won’t make him any more attractive to NBA scouts. By coming out now, Blair at least has youth and potential on his side (he turns 20 this month), and the most recent memories of him are of a relentless warrior who led a team that was ranked No. 1 in the country at one time.

With the NBA season coming to its end, the few teams that can’t make the playoffs start to focus on the draft. That means the local media there is focused on who they might pick.

The problem is that the NBA draft — like the NFL draft — is full of misinformation. What a team says versus what it does are different things.

The Indiana Pacers, for example are likely picking at the end of the lottery. Here’s what they are saying they need — and thus where the speculation goes.

“We need an athletic big who has a little bit of nastiness offensively and defensively within 10 feet of the basket,” O’Brien said before Saturday’s game against the Detroit Pistons. “That would be our top priority.”

Of course, there aren’t a lot of those kinds of players in this draft. Blake Griffin surely will go first. Then there are names like Arizona’s Jordan Hill, Kentucky’s Patrick Patterson and my early favorite, Pitt’s DeJuan Blair.

“We could try to get that player in a number of ways,” O’Brien said. “We’ve got a little bit of money to work with. There are trade possibilities. The problem is, if it’s a rookie, it’s a rookie. To ask a rookie to be that tough, nasty hombre inside, that’s a lot to ask.”

If the power forward the Pacers want isn’t available when they pick, they won’t hesitate to jump on the point guard of the future. How does Ty Lawson of North Carolina sound? Or Memphis’ Tyreke Evans?

Or how about New Jersey?

Nets team president Rod Thorn likely will dial NBA central casting this summer with a simple but awfully hard-to-fill request.

“Get me a moose.”

That will be among the Nets’ chief priorities this offseason — if not the No. 1 quest. In a perfect world, a 25-year-old Charles Oakley would walk into Thorn’s office, solving several major headaches.

“A guy who can defend, a guy who can rebound, a guy who does all the little dirty work out on the floor, sets screens,” Thorn said. “A guy like that is invaluable.”

And a guy like that answers the Nets’ glaring needs — defense and rebounding — as they move forward from a second straight lottery season.

“We need a guy who just cleans up the glass,” said Vince Carter, who sees some of that in Ryan Anderson. “We have a lot of scoring. We have a lot of shooters.”

As DraftExpress observes, “Sounds like DeJuan Blair to us. New Jersey currently is slated to draft 10th or 11th depending on tiebreakers at the moment, unless a shake-up occurs in the lottery.”

All of that means nothing at this point. It’s just chatter and speculation with more than two months before the draft. I keep coming back to what Darrelle Porter said the day before Blair made his announcement.

“I think DeJuan’s confident in his abilities and confident enough to put his name in, so he’ll probably stay in,” Porter said. “It’s hard to tell someone to come back and work on some things when he’s looking at a guaranteed contract. It’s been a goal of his for a long time.

“Now, he’s got a chance to reach his dream.”

He believes in his own abilities. He has always succeeded when people told him he couldn’t. He’s used it as fuel. As motivation. I have no doubt, he is saving every comment he reads saying he’s making a mistake or questioning the decsisions. That is just more for him to motivate.

Like everyone else, I hope it is enough.