Jon Bon Jovi unexpectedly cut his Madison Square Garden concert short Thursday night after appearing to have difficulty getting through the performance – forcing Train frontman Pat Monahan to step in and help carry the show across the finish line.

A representative for Bon Jovi confirmed to Fox News Digital that the concert ended early, saying the singer told fans from the stage he had been battling a health setback.

“Jon Bon Jovi spoke from stage and told fans he has been battling a sinus infection which led to the show’s early ending,” the representative said in a statement.

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“As part of the Bon Jovi residency at Madison Square Garden, Jon has said numerous times that it has been a joy to return to live shows for the band. Updated information will be available shortly.”

An insider who attended the concert told Fox News Digital Bon Jovi performed for roughly 90 minutes.

Bon Jovi’s previous Madison Square Garden residency shows have lasted over two hours, the insider noted. Thursday’s performance wrapped after approximately 15 songs, ending far earlier than fans had come to expect.

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Jon Bon Jovi performs onstage during Bon Jovi’s Forever Tour at Madison Square Garden on July 21, 2026, in New York City. (Kevin Mazur/Getty Images for Bon Jovi)

Monahan was in the arena as a fan Thursday night and was not part of the scheduled show, according to the insider.

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The 64-year-old rocker was performing on night eight of his nine-show residency when he stopped the show early. Monahan joined him for “Livin’ on a Prayer,” taking over the vocals midway through the song.

The shortened performance comes as Bon Jovi continues his comeback following vocal cord surgery in 2022. This is his first major tour since undergoing the career-saving procedure.

Just months before launching the “Forever Tour,” Bon Jovi admitted he had been prepared to walk away from music after a vocal cord injury left him fearing he could never perform at the level fans expected.

Jon Bon Jovi cut his performance short after battling a sinus infection. (Kevin Mazur/Getty Images for Bon Jovi)

In October 2025, Bon Jovi recalled realizing something was wrong after a 15-show run.

At the end of the final show, he told his wife he thought it was “pretty good,” but his wife disagreed, Bon Jovi recalled on the “How to Fail” podcast.

“I don’t think I could do this anymore. I don’t know why, but I’m OK with walking away from this because there’s no way I’m dragging down the legacy,” Bon Jovi said.

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Doctors later discovered the source of the problem.

“I sought out a surgeon who explained to me that one of my vocal cords had literally atrophied,” Bon Jovi said. “It was dying.”

He underwent surgery and received an implant designed to help his vocal cords close properly.

Jon Bon Jovi abruptly ended his Madison Square Garden residency. (Matt Winkelmeyer/Getty Images for The Recording Academy)

“If I worked hard, he promised me nothing other than I would be better than I was that night in Nashville,” Bon Jovi explained.

Still, the road to recovery wasn’t easy.

“Had I known that it was going to be a three-and-a-half-year recovery, I very well might have said thank you, good night,” he said. “But the process and the progress was steady enough that I didn’t lose faith.”

By the time he announced the “Forever Tour,” Bon Jovi said he felt “close enough to fully recovered” to return to the stage.

“I’m not doing this for the applause. I’m not doing it for the money. I’m not doing it the fame,” he said. “I’ve had enough of all of it.

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“But I would like to feel that joy and the resonance, even if it were only one last time. I don’t think this is anywhere near a farewell tour or anything like that. But if it were, you could trust that these few shows that I’ve announced are gonna be joy-filled.”

The “Forever Tour” began July 7 with a nine-show residency at Madison Square Garden and is scheduled to wrap Sept. 9 at London’s Wembley Stadium.