Chad Smith

GZR was an American heavy metal band led by Black Sabbath bassist/lyricist Geezer Butler. The band has actually been marketed with three different names on their three releases. In 1995, the band was marketed as g//z/r. In 1997, it was merely geezer, and in 2005, it was GZR. Most fans refer to the band as Geezer, although Butler himself refers to the band name as "gee-zed-R." This incarnation of the band is not to be confused with Geezer's previous attempt in 1985 to form a solo band, then known as The Geezer Butler Band - the two bands are completely unrelated.

The band's name is derived from the name of its creator: Terence "Geezer" Butler.

Pedro Howse, the guitarist in the band, is Butler's nephew.

The music is generally of a much harder edge than Butler is known for in Black Sabbath. This is not a surprise, as the vocalist on his first album (Plastic Planet) was Burton C. Bell from Fear Factory, who is known for more driving and harder edged vocals than ever was displayed in Black Sabbath. Before taking on Bell as vocalist for Plastic Planet, Butler contacted Devin Townsend to perform on the album. However, due to Townsend's recent stint with Steve Vai and having had to sing lyrics not written by himself, he was unwilling to enter into another band where he would have no lyrical input. That album also featured Pedro Howse on guitars, as well as Deen Castronovo (of to come Journey fame) on drums. Bell did not stay with the band past the recording of Plastic Planet, due to Fear Factory commitments. In 1996, the band re-emerged with an exclusive track for the Mortal Kombat: More Kombat compilation, entitled 'Outworld' and featuring Anger On Anger vocalist, Mario Frasca.

This proved to be a one-time collaboration and Frasca was replaced by Clark Brown from the band Symatic for their second album Black Science, released in 1997. The g//z/r formation did play a few live dates in 1997 behind the release of the album, however this was not a full-fledged tour, most of these gigs were played concurrent to the Ozzfest tour of that year. The band opened for such folks as Bruce Dickinson, who was playing some live gigs at the time.Castronovo recorded, but did not play any of the live gigs. He was replaced on drums by Chad Smith (not to be confused with the Red Hot Chili Peppers drummer with the same name).

After the handful of live gigs in 1997, the band was mostly put on ice, as Geezer was busy with various things Black Sabbath related for quite a while. Geezer eventually got back into the studio with the same lineup that played the live gigs from 8 years previous, and recorded their third album, Ohmwork, which was released on May 9, 2005.

• 1995: Plastic Planet
• 1997: Black Science
• 2005: Ohmwork

• "Mortal Kombat: Motion Picture Soundtrack" (1995) - performing "The Invisible"
• "Mortal Kombat: More Kombat" (1996) - performing "Outworld"

Current members

• Geezer Butler - bass, keyboards
• Pedro Howse - guitars

Former members

• Deen Castronovo - drums (1995–1997)
• Burton C. Bell - vocals (1995)
• Mario Frasca - vocals (1996) (credit only, "Outworld")
• J.C. Stokes - vocals (1996) (uncredited, "Outworld")
• Clark Brown - vocals (1997–2006)
• Chad Smith - drums (1997-2006)
• Lisa Rieffel - vocals (2005) (appearance only, "Pseudocide")

Timeline