Kevin Knox said he would be unable to finally meet LeBron James after he helped lead the Knicks to a stunning 124-123 win over the Lakers on Sunday at the Garden. Knox’s parents and little brother were in town, and spending time with them was the rookie’s priority.

But Knicks coach David Fizdale wouldn’t let Knox leave the Garden without introducing him to James, and they met briefly before the Knicks departed for Toronto, according to a source.

Fizdale had wanted Knox to meet James in hopes of the NBA legend offering the rookie some advice, but hadn’t been successful until Sunday. Fizdale and James are buddies from back in their Miami days when Fizdale was the Heat’s top assistant. James gave Fizdale a bear hug before tipoff.

Knox didn’t match up against James as much as he expected in their first meeting on the court — James had missed the teams’ January encounter — but that gave him plenty of energy for the offensive end. And Knox looked as lively as he has all season, going for a scorching 13 points in the first quarter and 19 overall. He shot 8-of-14, including 3-of-5 on 3-pointers.

“Hello, Kevin Knox,’’ Fizdale said. “It was good see him play well. He’s had his ups. We know it’s there. It’s a matter of the ball going in and getting his confidence up. He came out with mindset he was going to get out of this today. He was attacking and going after rebounds.’’

Indeed, in the first quarter, Knox pushed the ball upcourt to start the offense after both of his defensive rebounds. He finished with six boards and was a plus-7.

“I just came out aggressive and made some shots, had a couple of nice layups,’’ Knox said “My teammates found me for some nice passes. Coach Fizdale made some nice passes for me.”

Mario Hezonja proved the hero with a last-second block on James (after not playing for 12 games), but this was a progression for Knox, who has struggled, shooting just 36 percent. Knox guarded James just once, when he forced him into a missed 3-pointer in the final two minutes. In the days leading up to the game, Fizdale promised to have Knox guard James a lot, but Hezonja was handling the assignment well.

“I’ve been struggling a little bit,’’ said Knox, who has shot well in three of the past four outings and next faces off with Raptors star Kawhi Leonard. “But the whole team and coaching staff has confidence in me. I know I was going to come out of the [cold] streak.’’

It wasn’t a good sign for Lakers coach Luke Walton’s future that James sat on the last seat of the bench during a timeout and never joined a huddle during the first half. James was out of the game at the time. Before the game, Walton said he continues to seek advice from his former Lakers coach Phil Jackson, who feuded with James when the Zen Master ran the Knicks. Walton said Jackson has visited the Lakers’ facility.

“I stay in contact with him,’’ Walton said. “He’s very helpful. My spirits are good. Just talking basketball and running stuff off of him, getting suggestions on different ways to accomplish things. He’s been great.’’

DeAndre Jordan was the Knicks’ unsung hero, getting into triple-double range. The veteran center scored 15 points with 17 rebounds and seven assists