According to Hollywood urban legend, Bogart was so sick during filming that his voice had to be re-dubbed by an impersonator. In truth, though, the voice heard in the film is indeed Humphrey Bogart's own voice.
A TV sportscaster's man-on-the-street interview with a punch-drunk fighter filmed on location on Skid Row features multiple camera angles (long shot, middle shot and close-ups) - a technological luxury requiring three consecutively-rolling cameras no TV news station in the mid-Fifties could possibly have afforded.
Reporter:
What gives, Eddie? I looked up Toro in the book. There's no record of him in South America.
Eddie Willis: He knocked out thirty-eight guys in a row. None of them went over three rounds. You believe that one and I'll tell you another.
Nick Benko: The people, Eddie, the people! Don't tell me about the people, Eddie. The people sit in front of their little TVs with their bellies full of beer and fall asleep. What do the people know, Eddie? Don't tell me about the people, Eddie!