Conversation so far:
What is the Blood, Sweat & Tears' Jerry Fisher era?
Singer Clayton-Thomas left in early January 1972 and was replaced by Bobby Doyle and then Jerry Fisher, who went to front the next incarnation of Blood, Sweat & Tears.
What was unique about the Blood, Sweat & Tears' Jerry Fisher era?
The new edition of Blood, Sweat & Tears released New Blood in September 1972, which found the group moving into a more overtly jazz-fusion repertoire.

Question: Did it become popular?
Self-contained rewrite: Did the Blood, Sweat & Tears' release of the album New Blood become popular?