David Clayton-Thomas, the lead singer of Blood, Sweat & Tears whose husky, high-strung tenor on “Spinning Wheel,” “And 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. He was a stocky, onetime street fighter and petty thief in 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 its self-titled second album. Backed by horns, keyboards and percussion, his urgent shout was a signature voice of the era. A spokesman says Clayton-Thomas died Wednesday in Toronto.

Clive Davis, who rose from a job as a record company lawyer to become one of the music industry’s most powerful figures, has died at the age of 94. Davis launched or resurrected the careers of countless superstars, including Janis Joplin, Whitney Houston, Carlos Santana and Alicia Keys. Unlike other record moguls whose influence waned as they got older, his might only seemed to grow over the decades in a career that spanned multiple genres and labels. Davis also signed up Billy Joel, Blood Sweat & Tears, Patti Smith, the Grateful Dead and “American Idol” winners Carrie Underwood and Kelly Clarkson.