Rocker Billy Corgan Rips Into John Mayer

 Paul Morigi/; Brian Ach/WireImage for On 3 Productions

Billy Corgan is slamming John Mayer for his recent loose-lipped Playboy interview in which he detailed his sexual relationship with singer Jessica Simpson.

"He's trying to destroy his career," the Smashing Pumpkins frontman, 42, tells Rolling Stone in an interview outtake. "Rather than take a year off or change his musical direction, some part of it is irritating his soul to the point where he's trying to blow it up. Certainly a talented guy, but empathetically, standing on the sidelines, it's hard to watch someone literally burn their career to the ground speaking as somebody who's done it."

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In his now-infamous March Playboy interview, Mayer, 32, said Simpson, 29, was "crazy" in bed and referred to her as "sexual napalm."

"I think for any person who has celebrity to sort of drop rocks at somebody else's feet like that, there’s things you should really just keep your mouths shut on," says Corgan. "There's things that should just be left alone."

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Corgan — who declined to confirm whether he and Simpson ever dated — recently told Rolling Stone that Simpson is worthy of love. "If people knew her like I knew her, they would love her like I do," said the rocker, who helped her pen part of the theme song to her VH1 reality show, The Price of Beauty, which airs March 15.

On the Late Show With David Letterman Wednesday, Simpson said she wished Mayer — whom she dated on-and-off from 2006 to 2007 — would've kept quiet.

"Normally you would think that somebody you care about would keep those intimate details to himself," she said. "I mean, it was definitely a compliment, in a way, but I don't really want people to know that about me. That’s, you know, I’m like the good girl and then that happens."

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When Letterman, 62, told her that she can be both a good and bad girl, Simpson replied, "Yeah, but that's the thing — I am … but he gave away my game!"

Though she has not talked to Mayer since the interview came out, she said, "I will always care about him. I think he’s a great person, a great musician, but I was very disappointed by the article."

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