PORT ST. LUCIE — David Wright shed some light Friday on his rehab from neck surgery and the sharp pain in his right shoulder when he throws.

“I’ve got to finish the shoulder program that our team doctors have given me to complete,’’ Wright told The Post at First Data Field on St. Patrick’s Day as the Mets clubbed the Cardinals, 16-2. “Once that’s completed then we’ll try throwing again and hopefully it’s relatively pain free.’’

That will be in about two weeks. When the season starts, Wright will remain in Florida because he is so far behind.

And this isn’t just any pain.

“When I first started throwing, I could tell it was just not right because I never had that sharp, shooting pain going into my shoulder like that,’’ Wright admitted. “There’s just no way of doing what I’m capable of doing at third base and being productive for this team with the pain.’’

Wright referred to this problem as a bump in the road. I asked him: Is this a bump in the road or the end of the road?

“I mean, I’m just doing what the doctors are telling me to get back on the field as soon as possible, that’s all,’’ Wright said, hoping for the best.

“I feel the shoulder kind of working a little better than it was when I first tried to start throwing, now it’s just a matter of finishing the program and hopefully starting a throwing program.

“But that’s assuming everything goes well, the shoulder program gets me to the point where I can throw without sharp pain.’’

There are no answers at this point.

“Every week our physical therapists talk to the doctors and they formulate a plan for the week and the therapist reports back to the doctors at the end of the week and they come up with something for the next week,’’ Wright said.

“I come in every day, they hand me a sheet of paper with the game plan for that day and together we accomplish that. Tomorrow there will be another sheet of paper. I don’t get to go compete on the field right now, so I compete against the rehab.

“It’s almost to some degree trying to retrain, reteach those muscles to work properly and fire properly.

“For everybody that I’ve talked to who has had, whether the same surgery, a similar surgery, you know Bobby Parnell, Nick Markakis, even Peyton Manning to some degree, you take for granted being able to pick up a ball and throwing properly,’’ Wright said. “It’s really trying to re-teach yourself, retrain yourself to doing it the right way so that your muscles in your shoulder are working properly.

“It’s been a bit of a challenge because it seems so easy.’’

Wright did not talk directly to Peyton Manning, “but I talked to people familiar with his rehab,’’ he said. “The stuff I’m doing is in the same category.’’

Was he expecting the worst with his shoulder following the surgery?

“I wouldn’t say I was expecting that. I was hopeful that things would have gone off without a hitch, but I knew and was told there may be some bumps in the road,’’ he said. “It’s neck surgery. I was very excited about the progression I got right after the surgery. It’s just that last hurdle kind of got me. Now it’s a question of clearing that hurdle.

“You need to be able to get up in that position and accelerate,’’ he said of the art of throwing a baseball. “When you accelerate, your shoulder drops this way. That is causing a very sharp pain and I just have to get rid of that.

“I threw and tried to push through the pain, but it got extremely difficult and it was tough to get through my 20 throws.

“Things are getting impinged because things are not working properly. Once you get everything working properly, I think it starts protecting the shoulder.’’

Wright can play through pain, but not the kind of pain he has been dealing with in his right shoulder when he throws. Compete against the rehab.