Born in Stoke Lacy, Herefordshire, England, Ralphs began playing blues guitar as a teenager, and in his early 20s in 1966, he co-founded the Doc Thomas Group. In 1969, the band would become Mott the Hoople, a name taken from the title and title character of a 1966 novel by Willard Manus.
The group’s self-titled first album, recorded in a week, won a cult following, but the two that followed were critical and financial flops. They finally found popular success and became glam-rock giants with the 1972 David Bowie-penned-and-produced song “All the Young Dudes.” But Ralphs felt creatively cramped in the band led by singer-songwriter Ian Hunter and left in 1973.
He would soon form Bad Company with Rodgers, a singer who had left his own band, Free.
The two had intended only to write songs together, and possibly to make a one-off album as a project. But when Free drummer Simon Kirke asked to sit in, they realized they were nearly a proper group already and went seeking a bassist. They found him in former King Crimson member Boz Burrell.