For the second straight game, Mitchell Robinson looked like the first-round pick, Allonzo Trier looked like the second-round pick and Kevin Knox looked like the undrafted rookie.

With the Knicks folding down the stretch Thursday night against the Cavaliers, 125-118, blowing a nine-point lead in the final five minutes, it was another big struggle for a foul-plagued Knox.

The 6-foot-9 former Kentucky star shot 3-of-12 for eight points. He was 0-for-4 from 3-point range and was a team-worst minus-11 in continuing his slide after hitting the rookie wall.

Knox is now 5-of-28 in his last two games as the 2018 lottery pick has had plenty of ups and downs in his rookie season. The combo forward shot 3-of-16 with two turnovers Tuesday against Orlando.

Coach David Fizdale admitted afterward some of his wide-open misses are looking like “a confidence issue.’’

“It’s tough, but I’m not getting too high or low,’’ Knox said after the loss snapped the Knicks’ two-game winning streak. “I’ll keep working. It’s definitely tough going through the ups and downs. But coming into this season, I knew I was going to struggle — sometimes I’d play good, sometimes I’d play bad. I’m never going to get down on myself.’’

The solid play of the surging Robinson (12 points, seven rebounds, two blocks against Cleveland) and the unsung, undrafted Trier (team-high 22 points) has certainly taken pressure off Knox’s questionable numbers.

Knox’s efficiency statistics and defensive tenacity are bound to become larger concerns. The most common excuse so far is he’s a young 19 — the second-youngest player taken in the 2019 draft after Memphis’ Jaren Jackson Jr.

But Knox’s shooting percentage has been an issue all season — and preseason — when he lost his lock on the starting job after shooting just 35 percent. He’s now at 36 percent.

Ex-Knicks coach Jeff Van Gundy is fond of saying the NBA can complicate matters, but it’s a “make-or-miss league.’’

“He’s inefficient like most young players but he has a good feel how to play offense,’’ Van Gundy wrote in an email. “I’m interested in how big of a jump he can make from year 1 to year 2.’’

Fizdale has maintained blind faith in Knox.

“It’s going to come,’’ Fizdale said before Thursday’s game. “It’s not anywhere near panic time. You’re talking about a 19-year-old kid.

“I want him to stay aggressive. We’re not going to get caught up in the percentages right now. He’s taking shots he can make. So keep taking them.’’

Knox’s effective shooting percentage is the truest barometer in his failure to help the 13-49 Knicks win more games. Effective shooting percentage gives extra weight to 3-point shots, but it hasn’t helped Knox.

His EFG is 42.9 percent, ranking him 442nd in the league among eligible players (240 field-goal attempts). That ranks Knox fifth-worst in the NBA among qualifiers. And he’s taken a whopping 678 shots — second on the Knicks after the departed Tim Hardaway Jr.

Against Cleveland, Knox picked up two early fouls and went to the bench. He shot an airball upon his return, then got his third foul midway through the second quarter, taking a seat again.

Knox had just two points when he came in with 5:40 left, hit two shots and made two free throws, but closed the game by missing his final three attempts.

“I’m getting some open looks, I’m just not making it,’’ Knox said. “I’m getting shots that I like — in the lane, easy-type shots that I missed.’’

Fizdale said his low production in recent weeks can be attributed to his weariness from playing what his coach says is almost two full college seasons since October.

“We’re at the 60-game mark,’’ Fizdale said. “I think he’s had a heck of a year already. His efficiency will come as he gets more comfortable where his shots are coming from as he gets stronger and used to the league.”

Knox was an alternate selection for the Rising Stars Challenge during All-Star Weekend. Nevertheless, fellow rookie Collin Sexton has had the better season and the Cavaliers point guard racked up 22 points Thursday, keying the comeback and receiving kudos from Fizdale afterward.

But Fizdale won’t ever take Knox to task.

“You’re looking at a blank piece of paper,’’ Fizdale said. “We’re trying to make sure we don’t skip any steps with him. Some of his struggles is he’s taking in so much and learning so many new things. At some point, when it all slows down for him, we’re going to have a heck of a player there.’’