Blood, Sweat & Tears (also known as "BS&T") is a jazz-rock American music group. They are noted for their combination of brass and rock band instrumentation. The group recorded songs by rock/folk songwriters such as Laura Nyro, James Taylor, the Band and the Rolling Stones as well as Billie Holiday and Erik Satie. They also incorporated music from Thelonious Monk and Sergei Prokofiev into their arrangements.

Clayton-Thomas left in early January 1972 to pursue a solo career. He was briefly replaced by Bobby Doyle and then Jerry Fisher, who went on to front the next incarnation of Blood, Sweat & Tears. Fred Lipsius left as well and was briefly replaced by Joe Henderson, before Lou Marini settled into the new lineup. Another founding member, Dick Halligan, also departed, replaced by jazz pianist Larry Willis (from the Cannonball Adderley Quintet), and Swedish guitarist Georg Wadenius, from the popular Swedish outfit Made in Sweden, joined as lead guitarist around the same time.  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. The album broke through the Top 40 chart (the last BS&T LP to do so) and spawned a single ("So Long Dixie", chart peak: 44) that received some airplay. Also included on the record was a cover version of Herbie Hancock's "Maiden Voyage", featuring the voice/guitar soloing of Georg Wadenius.  In mid-1973, Katz left to pursue a career as a producer (for Lou Reed and others). Winfield departed as well and was replaced by Tom Malone.  Blood, Sweat & Tears' next album, No Sweat (June 1973), continued in a jazz-fusion vein and featured intricate horn work. Tom Malone's stay in the band was brief and he left to make way for jazz trumpeter John Madrid. But Madrid's tenure was likewise short-lived and he never recorded with the band. Both Madrid and Soloff left in early 1974, making way for new horn player/arranger Tony Klatka on their next release, Mirror Image (July 1974), which also saw the addition of vocalist/saxophonist Jerry LaCroix (formerly of Edgar Winter's White Trash), sax player Bill Tillman, bassist Ron McClure and the exodus of original bass player Jim Fielder. This recording features the adoption of a sound pitched between Philly Soul and the mid-1970s albums by Herbie Hancock's Headhunters, along with aspirations to Chick Corea's jazz-fusion group Return to Forever.  Jerry LaCroix left BS&T to join Rare Earth after playing his final show with them at Wollman Rink in New York's Central Park on July 27, 1974. Luther Kent, a blues singer from New Orleans, was recruited to replace LaCroix.

What is the Jerry Fisher era?
He was briefly replaced by Bobby Doyle and then Jerry Fisher, who went on to front the next incarnation of Blood, Sweat & Tears.