2:41 PM ET

INDEPENDENCE, Ohio -- Cleveland Cavaliers coach J.B. Bickerstaff's job is secure, with the organization's backing, despite a first-round exit from the NBA playoffs, president of basketball operations Koby Altman said Friday.

Making their first postseason appearance since LeBron James left five years ago, the Cavs were bounced in five games by the New York Knicks, who overpowered Cleveland to easily win the series.

Bickerstaff was criticized for his strategy, along with his team seeming overwhelmed and pushed around by the Knicks. Cleveland's early elimination, plus the team's history of rash moves, triggered conjecture about a coaching switch.

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However, after giving a somewhat tepid endorsement of Bickerstaff during an end-of-season news conference Friday, Altman made it clear the Cavs are moving forward with their coach.

"End that speculation," Altman said in a text message to The Associated Press. "He's our head coach and we have a lot of support and respect for the job he's done."

The Cavs won 51 games during the regular season and were the league's top-rated defensive team before getting bullied by the Knicks, who advanced to the second round for the first time since 2013.

Altman said Bickerstaff has been instrumental in Cleveland's turnaround.

"J.B. has been through this rebuild from the ground up and he's done a phenomenal job instilling a culture here of accountability and hard work," Altman said. "You can't fluke your way into 51 wins and you can't fluke your way into the No. 1 defensive rating in the NBA. That's coaching.

"I know we have great defensive personnel, but you have to have buy-in from that and that comes from the head coach. We're extremely happy with J.B. and the job he's done. I think he's going to look back and reflect on what we could have done better, just like the players look back at what they could have done better."

Bickerstaff is 122-125 with the Cavs. He was an assistant in 2019 before taking over when John Beilein stepped down at the All-Star break. Cleveland won 22 games in Bickerstaff's first season, won 44 games and qualified for the play-in tournament the next, and made a bigger jump this year as the No. 4 playoff seed.

While the Cavs are disappointed in their postseason performance, Altman said there won't be any "sweeping changes" to the roster this offseason. He's confident Bickerstaff will grow from the experience.

"He's hard on himself," Altman said. "I think he's going to go back and watch a lot of this stuff, but I also know that the players love playing for him. He's created an amazing atmosphere here and there's excitement."