Buster Mathis was an American boxer who competed from 1965 to 1972. He was a top contender throughout his career, beating other top contenders including George Chuvalo and Chuck Wepner. He fought Heavyweight greats such as Muhammad Ali, Joe Frazier, Jerry Quarry and Ron Lyle; he also notably beat Joe Frazier as an amateur to qualify for the Olympics but was later replaced due to a hand injury.

George Louis Chuvalo is a Canadian former professional boxer who was a five-time Canadian heavyweight champion and two-time world heavyweight title challenger. He is known for having never been knocked down in his 93 bout professional career including fights against Muhammad Ali, Joe Frazier, and George Foreman. Chuvalo unsuccessfully challenged Muhammad Ali for the heavyweight championship in 1966. Chuvalo was inducted into the Ontario Sports Hall of Fame in 1995.