Attell's first professional fight was at age 17 on August 19, 1900, when he knocked out Kid Lennett in two rounds at the San Francisco Athletic Club. His mother, who strongly opposed his boxing, later became one of his staunchest supporters, betting on him to win.
Attell's first professional fight was at age 17 on August 19 1900 when he knocked out Kid Lennett in two rounds at the San Francisco Athletic Club His mother who strongly opposed his boxing later became one of his staunchest supporters betting on him to win