Brandon Jennings says there can be no more excuses that the Knicks are still getting to know each other. It’s 37 games in — closing in on the halfway mark — and the Knicks are worse than mediocre at 17-20.

In his usual candid way, Jennings reiterated Kristaps Porzingis’ remarks that the Knicks haven’t played well all season and ripped himself for being partly to blame. Jennings, the engine to the second unit as the backup point guard, said he isn’t getting it done after his hot start, coinciding with the Knicks going from 14-10 to a season-worst three games under .500.

“We have to find a way to get in a rhythm and be more consistent, including myself,” Jennings said late Saturday night after getting into a skirmish with Indiana’s Joe Young with 21 seconds left that led to a dual ejection. “I’ve been playing like s–t: a couple of times some good games, but the next time, ‘Where am I?’ I have to find a way to bring energy every game.”

The Knicks were in a dire mood after losing 123-109 to the Pacers, giving them their seventh loss in eight games and an 0-7 record on second nights of back-to-backs. The Pacers (20-18) headed off to London and the Knicks to oblivion in 10th place.

“Honestly, I don’t think we’ve played well at all this year,” Jennings said. “I don’t know if you’re watching it. We’re winning games because of our talent. Basketball-wise, I don’t think we’re playing basketball like we should. Maybe two games here and there. [We’re] not playing like I feel the Knicks should be playing.”

The Knicks defense is in shambles, ranked 24th in the NBA in defensive rating (points allowed per 100 possessions). Knicks coach Jeff Hornacek lost patience last week after a loss to the Magic loss when he said perhaps the roster “is just not capable” of playing better defense. He later backtracked and said he meant the coaches need to put the players in better defensive spots and not give them assignments they are not suited for.

The Knicks have 10 new faces and a new coaching staff, but no longer can they fall back on that as a crutch for a lack of chemistry on both ends. The Derrick Rose trade signaled this was a team Phil Jackson expected to win now. At least the Knicks have their first-round pick this year in a deep draft.

“A lot of us, we’ve been in league for a long time and playing a long time,” Jennings said. “We’re 37 games in now. How many times are we going to keep saying that? ‘New faces. New coaches.’ We got to, all of us including myself, we have to find a way to start getting it done.”

Because of his recent inconsistent play, Jennings said it’s hard for him to speak out too often.

“How much can I really say?” Jennings said. “I just try to play my part. Certain things I say, I say it out loud. I blasted the second unit after we lost a 15-point lead at home to Milwaukee. I take a lot of blame on myself first. If you want to talk, talk about yourself before you talk about anything else.”

Jennings wasn’t proud of his skirmish with Young at the end of the blowout loss, but still had the moxie to say afterward it will be “interesting” if the little-used Young gets into the game when the Knicks and Pacers have a rematch later this month. As one NBA scout told The Post about the combative backup point guard, “With Brandon, you still got to take the good with the bad.”

After the loss, Kristaps Porzingis said the team has been off-kilter the entire season, alluding to a chemistry that appears to be missing. The Knicks fell apart last season in January after a 22-22 start, costing Derek Fisher his job; this season’s collapse appears to have begun even earlier.

“It’s a different feel,” Porzingis said. “We have much more room to grow than last season at this point. We still have so much to grow. We got to start making steps in the right direction. It’s taken us awhile. Hopefully we can all stick together. I see ourselves growing as a team and getting to our goal of making the playoffs. We’re right there even with all the bad losing streak.”

Maybe it’s time for Hornacek to shake up the lineup when the Knicks host the Pelicans on Monday. He could start Kyle O’Quinn over an inconsistent Joakim Noah at center and try to spot in more of Ron Baker, a cerebral third-string point guard who has a plus-31 rating in the past two games (“Ron is a basketball player: He doesn’t look like much until he gets into the game,” an NBA scout said). Carmelo Anthony, who admitted his sore right shoulder hasn’t healed, could use fewer minutes as his defense seems to be sliding.

The scout added: “They’re good enough talent-wise, so it’s chemistry right now.”