In which year was this American heavyweight boxer born who was active in the 1950s through the 1970s, and was defeated by the former Canadian professional boxer George Chuvalo?
George Chuvalo: George Louis Chuvalo, CM (born September 12, 1937) is a retired Canadian professional boxer who was a five-time Canadian heavyweight champion, and two-time world heavyweight title challenger. George Chuvalo:  He did defeat top contenders such as Yvon Durelle, Doug Jones, Jerry Quarry and Cleveland Williams.
i don't know