The New York Jets have approached free agency with a zeal that borders on desperation.  And that has prompted many to conclude that the folks pulling the trigger really are desperate — desperate to win because they’re desperate to keep their jobs.

But owner Woody Johnson has proclaimed that neither G.M. Mike Tannenbaum nor coach Eric Mangini are on the hot seat for the coming season.

Johnson told the New York Daily News that Tannenbaum and Mangini will “absolutely” be back with the team in 2009. 

“I really think it takes time to build,” Johnson said. “You can’t do it in one season.”

But why would Johnson back himself into a corner on this one?  A lot can happen between now and January.  What if the team goes 1-15, or worse?  Or what if none of the guys in whom so much money has been invested do anything to help the franchise? 

There are far too many variables for any NFL coach or G.M. to be declared “absolutely” safe for the season beyond the one that hasn’t even unfolded yet.  And now that Johnson is on the record with his guarantee of job security for the top two guys in his football operations, it will be difficult if not impossible for Johnson to change his mind later.

No matter how the team’s fortunes unfold in 2008.