Crazy things are happening in Queens.

The Mets are in playoff contention. Pete Alonso is breaking records. And Jed Lowrie, a rumor as a Met, began a rehabilitation assignment Tuesday night.

The oft-injured infielder batted second as the designated hitter for Single-A Port St. Lucie, as he attempts to come back from an assortment of maladies that have kept him in Florida all season.

“We’re excited about that,” manager Mickey Callaway said before the Mets’ 9-2 victory over the Indians. “It’s still a situation where it’s going to be day-to-day obviously. But for him to get to the field, get his blood flowing … is exciting. Just see how he comes out of it and make the schedule out the next day.”

Lowrie went 1-for-4 with an RBI, and the one hit was an infield single. He looked to be running fine in video taken from the game.

When asked if Lowrie is in the clear medically now, Callaway wouldn’t go that far, saying he feels good enough to where the Mets believe “he’s going to be safe DH’ing.”

“But you can’t predict anything,” Callaway said.

The 35-year-old Lowrie, an All-Star a year ago with the As, was signed to a two-year, $20 million deal in the offseason, but suffered a sprained capsule in his left knee early in spring training. It wasn’t thought to be serious at the time, except it obviously was. He began a rehabilitation assignment in late April and appeared in eight games before being shut down with a strained left hamstring after advancing to Triple-A Syracuse.

He hasn’t been seen since, dealing with a right calf injury most recently. But with Robinson Cano possibly out for the season with a torn left hamstring, the Mets could obviously use Lowrie, who is still trying to find his way to Queens this season.