With the start of the NFL Draft just one day away, the Dallas Cowboys need (pick one):

• a miracle

• offensive line help

• a defensive lineman who can both rush the passer and stop the run

• Jimmy Johnson

An underachieving, 8-8 team, it seems, has lots of needs. Which is why some of us wouldn’t be startled Thursday night, if owner and self-appointed draft wizard Jerry Jones parachutes out of the first round’s No. 18 spot in exchange for extra picks.

He’s done it before, of course. As our paper’s Charean Williams cruelly reminded this week, Owner Jones has been at the helm for 59 draft-day trades since he bought the Cowboys. He’ll move up; he’ll move down. Jones, the eternal wildcatter, likes the action.

The hunch here, therefore, is that Jerry will see that none of the offensive linemen the scouts covet will be left on the board, and the Cowboys will slide down in the draft order for the chance to select someone who is (1) cheaper and (2) less likely to be burdened with high expectations.

This is why the Cowboys are like the Texas Two-Step — a lot of movement, but always ending in more or less the same place.

So what will it eventually be — lineman, pass rusher, a new safety for Monte Kiffin’s defense, or a wide receiver to complement Dez Bryant?

Or, perchance, my earnest suggestion: Draft a quarterback. Not in the first round, but early enough to secure a young and promising one.

Owner Jones doesn’t want to think about the future, because he realizes that he probably doesn’t have a lot of it to think about. Jerry will turn 71 this next football season so, in effect, he probably signed quarterback Tony Romo to a lifetime contract — his life, not Romo’s.

The franchise’s failure, however, to acquire an heir apparent at the position will come back to haunt the Cowboys one day, as it does most teams.

Since the Super Bowl years of the mid-1990s, the Jones regime has spent draft picks on quarterbacks only twice — Quincy Carter, second round in 2001, and Stephen McGee, picked in the fourth round in 2009. Both were busts.