Question: Is the documentary "The Bluffs Butcher" based on James Tillis, the boxer who was known as "Quick" due to his fast hand speed or Ron Stander, who challenged Joe Frazier for the heavyweight championship in 1972? 
Sentence (from "Bob Foster (boxer)"): Robert Lloyd "Bob" Foster (December 15, 1938 – November 21, 2015) was an American professional boxer who fought as a light heavyweight and heavyweight.
Relevant evidence: No