In 1967, Parks left Crowd +1 to become the musical director for "The Sonny & Cher Show" (the beginning of a long career as a session musician). He was replaced by Lee Pickens on guitar. It was also at this time that Stevie Hill joined the group on keyboards and vocals. They continued as Crowd + 1 until 1969 when they changed their name to Bloodrock, conceived by Grand Funk Railroad manager/producer Terry Knight. They also recorded their first album under Knight, "Bloodrock" (Capitol ST-435). The album, released in March 1970, peaked at 160 on the "Billboard" 200 chart.