No disrespect to Spencer Davis, but calling the band the SDG is like calling the Beatles the Ringo Starr Four. Steve Winwood was THE talent of the group. Songwriter, lead singer, keyboardist (one of the best ever on the Hammond B3 organ). He was only 14 in 1963 when SD saw SW and his brother at a Birmingham club. I guess he realized a great talent when he saw it. SW left SDG in 1967 after their 2 biggest hits, "I'm a Man" and "Gimme Some Lovin" to form Traffic, then later supergroup Blind Faith, and then a distinguished solo career.