Tool drummer Danny Carey will sit in on a handful of Primus dates in September while the band's original drummer, Tim "Herb" Alexander, continues to recover from open heart surgery following a heart attack last month, reports Kory Grow of RollingStone.com

"The mighty Tim 'Herb' Alexander is a polyrhythmic Viking of extreme and unique talent so the one person that we thought could step into his shoes and do it justice is the one and only Mr. Danny Carey," Primus frontman Les Claypool tells Rolling Stone. "Whereas Herb is the stocky, Easter Island-faced, boulder of a drumming human, at nearer to seven feet, Danny Carey is the mighty redwood tree of percussion; towering over his kit like a golden-haired noble sequoia.

The drummer will be joining the bass-rumbling alt-rockers for their Riot Fest appearances in Chicago and Denver, as well as an after party at the Windy City's Concord Music Hall on September 13th. Claypool reports that they decided to go through with the shows as a way to give Alexander some financial relief and that Carey was their top choice, since "we figured it would be hard to get [the Police's] Stewart 'Stew-daddy' Copeland out of his ivory tower," as Claypool joked.

While Carey's involvement might seem surprising, Tool and Primus are connected in a roundabout way, since Alexander has played with Tool singer Maynard Keenan in the bands A Perfect Circle and Puscifer. He will be back on the drum stool for the Primus and the Chocolate Factory tour, beginning in October.

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