Blood, Sweat & Tears were formed in 1967 by Blues Project member and Bob Dylan sideman Al Kooper, who wanted to merge rock and jazz elements into the band's sound. Two years after their formation -- and a great debut album, 'Child Is Father to the Man' -- Kooper was replaced by singer David Clayton-Thomas, who gave Blood, Sweat & Tears three No. 2 singles in a row: 'You've Made Me So Very Happy,' 'Spinning Wheel' and 'And When I Die.' Clayton-Thomas, in turn, was replaced by another singer, Jerry Fisher, in 1972, by which time the band's commercial stock had fallen. Members have come and gone over the years, and the group still exists in some form today, but without Kooper and guitarist Steve Katz, the two key players that helped set Blood, Sweat & Tears on their path.