NEW YORK (AP) — David Clayton-Thomas, the lead singer of Blood, Sweat & Tears whose husky, high-strung tenor on “Spinning Wheel,” “When I Die” and other hits helped make the so-called “brass rock” band among the most popular acts of the late 1960s, has died at age 84.

Spokesperson Eric Alper said that Clayton-Thomas died “peacefully” Wednesday at St. Michael’s Hospital in Toronto. Alper did not cite a specific cause.

Clayton-Thomas was a onetime street fighter and petty thief from Canada who briefly became a rock superstar, the front man of a nine-member group that sold millions of records and won two Grammys for “Blood, Sweat & Tears,” which beat out the Beatles’ “Abbey Road” for best album of 1969. Calling out amid a jazzy parade of horns, keyboards and percussion, Clayton-Thomas’ urgent shout was a signature voice of the era, preaching love on the Motown cover “You’ve Made Me So Very Happy,” a lasting legacy on Laura Nyro’s “When I Die” and a cool head on his own “Spinning Wheel.” Meanwhile, Blood, Sweat & Tears helped inspire a wave of horn-led bands, among them Chicago, the Electric Flag and Ten Wheel Drive.