claim: Dave Grohl was in Probot.
evidence: Probot was a heavy metal side project of ex-Nirvana drummer and Foo Fighters rhythm guitarist and lead-singer Dave Grohl .. heavy metal. heavy metal music. side project. side project. Nirvana. Nirvana ( band ). Foo Fighters. Foo Fighters. Dave Grohl. Dave Grohl. Described by Grohl as `` a death metal Supernatural '' , the album mixes instrumentals recorded by Grohl himself with various metal singers which the musician admired .. death metal. death metal. Supernatural. Supernatural ( Santana album ). The album was released in February 2004 by Southern Lord Records .. Southern Lord. Southern Lord Records. Southern Lord Records. Southern Lord Records. It featured one single entitled `` Centuries of Sin ''  /  `` The Emerald Law '' .. single. single ( music )