Pop/rock singer/songwriter/guitarist Dave Mason was born May 10, 1944, in Worcester, England. He was a professional musician by his teens and, as a member of the instrumental group the Jaguars, made his recording debut on a locally released single, "Opus to Spring," in 1963. It was with the Jaguars that he first encountered drummer Jim Capaldi, and the two became members of the Hellions, who played around the U.K. and in Hamburg, West Germany, as well as cutting a few singles in 1964 and '65. Mason quit the Hellions in the spring of 1965 to study music formally, while also sitting in occasionally with another band featuring Capaldi, Deep Feeling. In early 1966, he took a job as road manager for the Spencer Davis Group, where he encountered Steve Winwood; various reports suggest he also played with the band on-stage and may have sung backup vocals on the hit "Somebody Help Me."