Spirit was an American jazz/hard rock/psychedelic band founded in 1967, based in Los Angeles, California.
The original lineup of the group was Randy California (guitars, vocals), Jay Ferguson (vocals, percussion), Mark Andes (bass), California's stepfather Ed Cassidy on drums, and keyboard player John Locke. The new band was originally named the Spirits Rebellious (after a book by Khalil Gibran) but was soon shortened simply to Spirit. All but Locke had been part of the band The Red Roosters in 1965. California (then still known by his birth name of Randy Wolfe) had also played with Jimi Hendrix (then known as Jimmy James) in Jimmy James and the Blue Flames for three months in 1966.
Ed Cassidy is notable as one of the most accomplished drummers in rock and was instantly recognizable by his shaven head and proclivity to wear black. He was considerably older than the rest of the group (born in 1923). His earlier career was primarily in jazz and included stints with Cannonball Adderley, Gerry Mulligan, Roland Kirk and Lee Konitz. He was a founding member of Rising Sons with Taj Mahal and Ry Cooder.