Black Sabbath bassist Geezer Butler feared that the band had picked the wrong drummer when they started working with Brad Wilk on upcoming album 13, which is due out Tuesday.
They selected the Rage Against the Machine drummer from a shortlist drawn up by producer Rick Rubin – which included Ginger Baker – after Tony Iommi ended negotiations with original sticksman Bill Ward over his return.
But Geezer Butler admits they thought they'd chosen the wrong man for the job at first. The bassist says: "We literally had two weeks to work with him before we recorded the songs. The first week we were going, 'This guy's just not working out,' and we were panicking.
"We went into the studio and recorded the first three songs with him – and that was probably where Rick really worked out the most. He had the definite idea of what the drummer should do, so he was communicating with Brad, and he's worked with Brad before."