DevilDriver bassist Aaron "Bubble" Patrick has been hospitalized with pneumonia, and is currently undergoing tests which will force him to miss the kickoff of the band's latest North American tour. Chris Towning, who played with Patrick in Bury Your Dead, will fill in for him.

The Metal Alliance Tour launches this Thursday, March 15 at the South by Southwest Music Festival in Austin, Texas, and features DevilDriver headlining, with support from The Faceless, Dying Fetus, Job for a Cowboy, 3 Inches of Blood, Impending Doom and Wretched.

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