Isaiah Whitehead was a unanimous All-Big East first-team selection. Kevin Willard shared Coach of the Year honors with Villanova’s Jay Wright. Angel Delgado was an honorable mention.

Khadeen Carrington? He was overlooked — again.

“I was kind of mad about that, but I think everything they got was well-deserved,” the sophomore guard said. “It definitely motivated me. But I’m the type of guy, my teammates get something, I’m happy.”

He reminded those coaches they made a mistake Thursday night, sinking the go-ahead basket in the final minute as part of a career night as third-seeded Seton Hall held off No. 6 Creighton, 81-73, in what was so far the best game of the Big East Tournament by a wide margin.

“This is what he’s done all year,” Seton Hall coach Kevin Willard said of Carrington, who was 10th in the Big East in scoring at 14.3 points per game during the regular season. “This is who he’s been. I thought tonight he was great. I thought he was aggressive. I thought he was efficient. And he made some big shots for us.”

Seton Hall (23-8) will face second-seeded Xavier Friday at 9 p.m. in the semifinals, its second time in the conference final four in three years. The two teams split the season series, each winning on the other’s home floor. The Pirates last won it all way back in 1993, which is also the last time they reached the final.

Carrington, a 6-foot-3 guard who starred at Bishop Loughlin High School in Brooklyn, scored a career-high 27 points on 10-of-17 shooting, making every big shot down the stretch as the Bluejays rallied from a 14-point, first-half deficit. In high school, his jump shot was a weakness, one reason several power-conference schools shied away from him, including St. John’s. But he has tirelessly worked on it at Seton Hall, shooting 32 percent from 3-point range this season, and sank 5-of-9 from beyond the arc against Creighton.

“We worked a lot in the summer [on our shooting],” said Whitehead, who had 24 points, 12 rebounds and six assists in another complete performance. “When he’s rolling like that, you got to keep feeding him the ball.”

Carrington and Whitehead, the two Brooklyn kids who wanted to stay close to home for college and found a home at Seton Hall, took over the Garden stage, combined for 51 points, including the final 10 for the Pirates, who survived Cole Huff’s 35-point masterpiece. Carrington’s left-handed leaner with 50.6 seconds left gave Seton Hall the lead for good, and Whitehead followed with a blocked shot, two huge rebounds and four free throws to ice it.

“He’s a winner — that’s what winners do,” Carrington said.

It was a raucous atmosphere at the Garden for the Pirates, who had most of the building behind them after St. John’s was ousted Wednesday night. Before the opening tipoff against Creighton (18-14), “Let’s Go Pirates” chants echoed throughout the building. There were “MVP” chants for Whitehead, the Garden erupting after every big Seton Hall shot or stop.

“It definitely felt like playing at home,” Carrington said. “I think we gained a lot of fans this year, people from the New York area supporting us. That’s what we came here for, we didn’t want to go too far. We wanted to keep it at home.

“[St. John’s] is done this year, so I think their [fans are] going to be rooting for us now.”