Matt Harvey will figure it out. Mets manager Terry Collins is clinging to this hope, though he has no idea just how long his slump will last.

“He’s struggling with it but he’s a competitive kid,” Collins said of Harvey, who pitches Thursday’s series finale against the Nationals. “And it’s like I keep telling him, you’ll get through this, it’s just going to take a little bit of time.”

Harvey is a pedestrian 3-5 with a 4.94 ERA over his eight starts. He has failed to rack up the swings and misses that have been a staple of his career and his velocity has been hit and miss.

The Mets have insisted throughout Harvey’s lull that the root of the issue is strictly mechanical. And the pitcher himself has griped about the inconsistency in his delivery.

“As we all know, you can fall into these bad habits and he’s fallen into one,” Collins said. “When you’re out there, obviously the one thing you can’t think about is hey, look, I have to do this correctly. You’ve got to think about just making the pitch.”

Matz OK to go

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Steven Matz emerged from his scheduled bullpen session on Wednesday with no issues. He is on track to start Friday’s series opener against the Brewers.

Matz rejoins the rotation after missing his last start with stiffness in his left forearm and elbow. His return allowed the Mets to push back Jacob deGrom’s start a day, in hopes that the extra rest helps him rediscover some life and velocity on his fastball.

Extra bases

Travis d’Arnaud (right rotator cuff strain) is encouraged by his progress and expects to return soon to the team’s facility in Florida, where he will begin baseball activities. The catcher has been with his personal trainer in California to strengthen his shoulder and regain full range of motion . . . Lucas Duda (back soreness) is expected to rejoin the starting lineup for Thursday’s series finale.