what was this vocalist into before joining the aforementioned band?
He was a member of the band Savoy Brown.
Dave Walker
In 1971, guitarist Kim Simmonds, leader of blues-rock band Savoy Brown, lost the rest of his band - guitarist Dave Peverett, bassist Tony Stevens, and drummer Roger Earl - after they decided to depart Savoy Brown in order to form Foghat with former Black Cat Bones guitarist Rod Price. To replace the departing members, Simmonds hired Walker on vocals,
songs on the album rumors by fleetwood mac "Go Your Own Way", "Dreams", "Don't Stop",  "You Make Loving Fun" , and others. does this album belongs to any band? Yes, Fleetwood Mac. who are its members? Peter Green, Mick Fleetwood, Christine Perfect, Jeremy Spencer and, John McVie. where was the above album recorded? Record Plant in Sausalito, California. what is the genre of the band? Rock. how did the album perform commercially? It was an instant commercial success. was their any dispute regarding the band's name? Yes, the band manager , Clifford Davis formed the "New Fleetwood Mac" and made them perform in the place of the original. which awards did it win? Yes, the album won a Grammy Award for Album of the Year in 1978. name some other album or songs of it? "Albatross", "Oh Well", "Man of the World" and others. is the first one song or album? UNANSWERABLE was the band named after the second member you mentioned above? Yes, his and that of John "Mac" McVie. which instrument does he play? The former played drum. is the former the vocalist of the band? No, he was the drummer. then who was the lead vocalist of the band? The vocalists kept changing and one such vocalist was Dave Walker.
wiki:1118916
Dave Walker [SEP] Savoy Brown (1971–1972)
In 1971, guitarist Kim Simmonds, leader of blues-rock band Savoy Brown, lost the rest of his band - guitarist Dave Peverett, bassist Tony Stevens, and drummer Roger Earl - after they decided to depart Savoy Brown in order to form Foghat with former Black Cat Bones guitarist Rod Price. To replace the departing members, Simmonds hired Walker on vocals, along with three recently departed members' of Stan Webb's Chicken Shack - keyboardist/guitarist Paul Raymond (later of UFO and Michael Schenker Group), bassist Andy Silvester, and drummer Dave Bidwell. They recorded the "Street Corner Talking" album in 1971 on Parrot/Deram Records, which included one of Savoy Brown's biggest hits "Tell Mama", written by Raymond, and they headlined a tour over Rod Stewart and The Grease Band in early 1971, as persistent touring was beginning to pay off for the Savoys.