PORT ST. LUCIE — Darryl Strawberry can’t understand why the player who broke his Mets all-time home run record left Queens.

Pete Alonso, according to Strawberry, will regret leaving the Mets.

“I was really shocked that Pete would leave New York for Baltimore,” Strawberry said Monday at spring training. “Pete could have broken all the records and could have been on top of every offensive category for this organization, and then sometimes when you don’t see that and realize how important that is, one day he is going to wake up just like I did and regret you didn’t stick where you are at.”

Strawberry, who left the Mets through free agency to join the Dodgers after the 1990 season, said Alonso — who received a five-year deal worth $155 million from the Orioles — never should have opted out of his contract after last season.

Alonso would have received $24 million this season from the Mets if he didn’t opt out.

Darryl Strawberry is pictured at the Mets’ spring training session Feb. 23. Corey Sipkin for the NY Post

After his opt-out, Alonso never received an offer from the Mets.

According to sources, the team was expecting him to circle back after exploring the market, but the length of the Orioles offer made it a moot point.

“The biggest mistake I saw was after they lost in Miami, he opted out,” Strawberry said, referring to the Mets’ final game last season. “I think if he just waited and said, ‘OK, I’ll stay at that, but give me a four-year deal,’ something like that, they could have worked it out.”

Strawberry was asked if the Mets should have fought harder to keep Alonso.

“I think it’s a combination,” Strawberry said. “I think they both could have fought harder in that situation.”

Alonso last season eclipsed Strawberry’s franchise record of 252 homers.

Darryl Strawberry is pictured at the Mets’ spring training facility Feb. 23. Corey Sipkin for the NY Post

Like Strawberry, he was a homegrown Mets player.

“He worked his way up to become the player that he was,” Strawberry said. “He deserved all the credit for that and what he accomplished. I just don’t leave New York to go to Baltimore. Don’t get me wrong; I am not getting on Baltimore. But I am saying, this is New York, come on. Baltimore is a good place, but it’s not New York.”

Strawberry, in camp until Friday as a guest instructor, said he’s impressed with the new cast imported by president of baseball operations David Stearns.

It’s a retooled lineup that includes veterans Bo Bichette, Jorge Polanco and Marcus Semien.

In addition to Alonso’s departure, the Mets traded away Brandon Nimmo and Jeff McNeil.

Darryl Strawberry speaking at Citi Field last season. Corey Sipkin for the NY POST

The moves followed a season in which the Mets finished one victory short of the playoffs to complete a second-half meltdown.

“What they have done is gotten more contact hitters, more guys that can put the ball in play, and there is nothing wrong with that because you have to be able to win games that you need to win,” Strawberry said. “Last year was a year I was heartbroken for them because all you had to do was win one game to get into the playoffs. If you can’t win one game, something is wrong. Who are you going to blame? You can’t blame the front office for that. It’s the players that have got to get it done. Hopefully, this season will be different for them, and the fans will embrace what team they are trying to build.”

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Team owner Steve Cohen said last week the Mets won’t appoint a captain as long as he owns the club.

Strawberry, who played for Mets teams that were captained by Keith Hernandez and Gary Carter, said he shares the view that an official team captain isn’t important.

“I think people overanalyze that more than anything,” Strawberry said. “They have got [Francisco] Lindor, [Juan] Soto, Marcus, Bo, guys that are veterans. These guys know how to play. They have played a lot of games — a lot of big games.”

Strawberry, 63, indicated his health has steadily improved following a second heart attack in less than two years.

“I have got so much more work to do,” said Strawberry, who travels the country as part of his Christian ministry.