The Nets aren’t saying when injured Jeremy Lin will be able to play again. But it can’t be soon enough. They were 2-3 with their starting point guard, but have lost six of eight without him. And the advanced statistics tell an even grizzlier story.

With Lin on the court, the Nets’ offensive rating is a 109.3 and their defensive rating is 107.4, for a respectable plus-1.8. But without their floor leader, their ratings change to 103.6 and 109.0 for a terrible minus-5.7.

In short, Lin’s presence is worth 7.2 points every 100 possessions. That’s a game-changer, and his absence since Nov. 2 has been just that for the Nets.

“Offensively it’s just the challenges with different lineups and different stuff just getting on the same page,’’ coach Kenny Atkinson said. “But we’ve done it before with different lineups, so [we have to] focus in on our execution, making sure that we’re doing all the little things, in the right spots and making the right pass and making the right play.”

The Nets have been dissected by opposing points guards, including a recent string against the Clippers’ Chris Paul (32 points), the Lakers’ D’Angelo Russell (21) and the Thunder’s Russell Westbrook (30). They allowed 18 points Sunday to Damian Lillard, who had been averaging a career-best 28.7 points per game.

Brooklyn’s point guard carousel came around to Isaiah Whitehead. The Coney Island native had not started since suffering a concussion in the Nov. 8 win over Minnesota, missing three games and then coming off the bench in the previous two.

Whitehead shook off a hard fall on his elbow and had a career-high 11 points and two assists, albeit on 2-of-10 shooting. And the rookie was not only studying the string of elite guards, but also picking Lillard’s brain.

“Oh, definitely. While we were shooting free throws and they were shooting free throws I was asking Damian Lillard questions. So I’m out there trying to learn as much as possible,’’ Whitehead said. “Either he’s going to answer them or he’s not. But he was great enough to answer them. I asked him how’d he get so quick, how did he read ball screens. I’m just trying to learn as much as possible.

“I just went for it. He gave me great answers. He just told me keep working. He perfected his craft, perfected certain things. That’s why he’s the player he is.

“This is my first time asking, because I watched him a lot. Him and C.J. [McCollum] were one of my favorite backcourts, their grit, their toughness, their relentlessness. They go all-out. That’s the type of player I think I am, so I try to learn.”

Trevor Booker had 16 points on 7-of-9 shooting. Reserve Justin Hamilton added 11 on 4-of-7 shooting, 3-of-6 from deep.