The Mets finally have at least partial clarity to what has kept Jed Lowrie off of a major league field for the better part of two seasons.

It’s far from conclusive, but a second opinion revealed what GM Brodie Van Wagenen referred to as ‘PCL laxity,’ or limited strength in the posterior cruciate ligament.

“When he wears his larger brace, that pain is mitigated,” Van Wagenen said. “When he takes that brace off or plays in a smaller brace then that pain increases.”

It is too early to tell if the condition will require surgery, Van Wagenen added.

Lowrie looked to be trending in the right direction during Summer Camp, where he participated in low-intensity simulated games and batting practices. Ultimately, the pain prevented him from being a full-go for the regular season.

The Mets have been reluctant to place Lowrie on the 45-day injured list, which would clear a spot on the 40-man roster but virtually close the door on the two-year, $20 million contract he signed in January of 2019.

“We think the player can help us,” Van Wagenen said. “We saw it in Summer Camp. Offensively, he can be a value add to the team.

“The goal would be to get him back to contribute but the conversations that come from the doctors here over the next couple of days will determine what the timeline is based on the course of action.”

Though joint ailments have a tendency to be chronic, Van Wagenen doesn’t believe that the PCL laxity would have gone unrecognized at the time of Lowrie’s signing.

“The PCL laxity has been part of the root of his problem here for several months. As far as missed when he signed, I don’t believe that’s the case.”

Operating without Lowrie is nothing new for the Mets, who have a slew of mediocre-at-worst infield options to plug in. Despite not participating in Summer Camp, the recently-signed veteran Brian Dozier was promoted to replace Eduardo Núñez, who joined Lowire on the injured list on Thursday.

“Obviously he’s got pedigree having been an all-star, a Gold Glove winner, a world champion last year,” Van Wagenen said of Dozier.

“This guy has always been able to hit, particularly against left-handed pitching. We felt like Brian gave us a real threat from the right side of the plate.”