PORT ST. LUCIE — David Wright’s chances of beginning the season with the Mets now appear razor thin.

The Mets captain returned to New York on Tuesday and was diagnosed with an impingement in his right shoulder, according to general manager Sandy Alderson, which precludes Wright from throwing.

“He’s not going to be throwing for a couple of weeks and probably not throwing with any real zip for a period after that,” Alderson said. “He can continue to DH, but in the meantime he will be doing lots of shoulder exercises.”

Alderson said the impingement is correlated to Wright’s surgery last June for a herniated disk in his neck.

Wright has missed most of the past two seasons, first dealing with spinal stenosis and then recovering from neck surgery.

Alderson was asked if third base is still a realistic option for Wright, who conceivably could be shifted to first base.

“If he can’t throw, it makes every position less realistic,” Alderson said. “We need to wait and see if this shoulder issue continues. Our goal is to get him back to third base.”