David Wright’s return remains uncertain. The Captain, out since April 15 with a hamstring injury, is at the team’s minor-league complex in Port St. Lucie, Fla., working to get back, but he’s still not at 100 percent, general manager Sandy Alderson told The Post.

“It’s just hard to say,” Alderson said, when asked about a possible return. “He could be a week away, could be 10 days away. Until he gets into a game situation and feels confident with the leg, we’re not going to know.”

Wright was eligible to come off the 15-day disabled list last Thursday. Alderson said once Wright is 100 percent confident in the leg and is running at 100 percent, he would be five days or less away from getting back to Queens.

“We haven’t gotten to that threshold yet,” the general manager said.

The Mets announced on Monday minor-league catcher Johnny Monell is headed to New York and will be called up for Tuesday’s series opener against the Orioles. No corresponding move was announced.

The plan is to carry three catchers at least in the short-term, according to a club source, with the left-handed hitting Monell being used as a bat off the bench and Anthony Recker still serving as the backup catcher to Kevin Plawecki. Infielder Eric Campbell and outfielder Kirk Nieuwenhuis are the main candidates for subtraction, but the team could also bump a reliever if it chooses.

Monell could also see time against tough right-handed pitching. The Bronx native who attended Columbus High School reached the major leagues with the Giants in September 2013, and signed a minor league deal with the Mets last November.

The 29-year-old catcher was batting .397 with four home runs and 15 RBIs in 17 games with Triple-A Las Vegas.

Wilmer Flores had no problem with Mets manager Terry Collins giving him Saturday and Sunday off to clear his head. Flores had committed errors in back-to-back games and also struck out four times Friday night against Nationals ace Max Scherzer. He is expected to be back in the lineup Tuesday.

“Hopefully, it helps the next game,” he said after Sunday’s 1-0 loss to the Nationals. “Nobody wants time off, but if the manager gives you the time, just take it and relax.”

Despite committing seven errors in just 27 games at shortstop, Flores remains confident he can do the job.

“I can’t let anything keep me down,” he said.

Alderson said top pitching prospects Noah Syndergaard or Steven Matz, both thriving with Triple-A Las Vegas, could be up for a spot start over the next few weeks, but there are no plans to promote either at the moment.

Pitcher Logan Verrett, a Rule 5 Draft casualty, was returned to the Mets on Monday from the Rangers and sent to Triple-A Las Vegas.

The Mets’ Single-A affiliate, the Brooklyn Cyclones, will honor the 30th anniversary on Aug. 26 of mystery prospect Sidd Finch, made famous in George Plimpton’s “Sports Illustrated” April Fool’s hoax. The first 2,500 fans will receive a Finch bobblehead, and there will be a speed- pitch competition where fans will have three combined chances to match Finch’s fictional 168 mph fastball.

Additional reporting by Mike Puma