Mitchell Robinson’s specific injury is identified. 

The backup center suffered a fracture of his fifth metacarpal, league sources told The Post, which is the bone connecting the wrist to the pinky finger. 

It’s still unclear how or when Robinson suffered the injury to his right hand, but coach Mike Brown said it didn’t occur during Monday’s conference-clinching victory in Cleveland or a subsequent practice.

The Knicks said they’d provide no further details on the fracture, including its cause.

On Saturday afternoon, Robinson addressed his supporters and detractors on Instagram. 

“I can’t thank you guys enough for the love and support most of you bring especially at a time like this in my life,” Robinson wrote under a picture of him walking into the Cavs arena during the conference finals. “It makes everything in fighting for 100x easier to deal with. 

“The ones that want to see me down and hurt all I gotta say for you is f–k you. And last the ones that say they love and care about me but can’t be there for me when I need them but I’m always there to when they need me god get you.” 

Robinson underwent surgery recently, sources said, and there’s hope he’ll play Wednesday in Game 1 of the NBA Finals vs. the Spurs.

Robinson did not participate in practice Friday, and the Knicks are scheduled for another session Sunday.

“Mitch is very important to us,” teammate OG Anunoby said. “Amazing player. It’s unfortunate what happened, but I’m sure — just take it day by day now.” 

Metacarpal fractures are not uncommon in the NBA, with Manu Ginoboli (in 2012), Anthony Davis (2013) and Gordon Hayward (2020), among many others, suffering the injury to varying degrees and with wide-ranging recovery times. 

In 2021, Robinson suffered a fracture of the fourth metacarpal in his right hand, underwent surgery, and was out several weeks — including the first-round playoff series against the Hawks. 

If Robinson plays in the Finals, he will likely wear some sort of protection on the surgically repaired area.

And since it’s his shooting hand, the impact on his game will be something to monitor. 

Before Robinson’s most recent fracture, the 28-year-old was projected as a prominent figure in the NBA Finals. He’s the top offensive rebounder and rim protector on the roster, the best equipped to deal with San Antonio’s Victor Wembanyama.

Perhaps more importantly, Robinson is insurance for Karl-Anthony Towns, who is susceptible to foul problems. 

After Towns and Robinson, Ariel Hukporti — a second-year player from Germany — and Jeremy Sochan — a little-used midseason free agent signing — are the other centers.

“For me, I’m always going with whoever is available today,” Brown said Friday. “And [Robinson] didn’t practice today. So we’re getting whoever we need ready to go. … I don’t want to know, just let me know if he can play and when he can play. Just like we normally would, we’re getting everyone else ready to go.” 

The irony with Robinson’s predicament is he was load managed all season to protect him from another ankle injury (he had multiple surgeries to his left ankle).

The idea was to maintain his health for the playoffs, only to have Robinson suffer a mysterious hand fracture just before the Finals. 

Still, the Knicks are fortunate.

They will have benefitted from nine days off before Game 1 of the Finals, which is their reward for sweeping the Cavaliers in the conference finals while waiting for the Spurs, who outlasted the Thunder on the road on Saturday night to win a grueling seven-game series in the West.

Other than Robinson, they’re healthy and available. 

“We have to prepare,” Towns said. “And we’re preparing every single day for whatever the situation may be, and we’re ready. We have a lot of days off — we’ve been fortunate, it’s a fortunate thing that it happens when we have a lot of time or we can figure out a lot of the puzzle. 

“But, you know, we don’t know what the picture is yet [regarding Robinson] until we get to Game 1.”