Other mistake: During the first round of the duels we see a part of the participants list and "Scars" is missing. He should appear between "Spotted Horse" and "Sparks" according to their order of entering the competition.
Other mistake: When Leonardo DiCaprio is shot by Gene Hackman, he lays on the ground with his feet splayed out. The bottoms of his shoes are perfectly clean, no dirt, no dust, no wear and tear. The girl that is tending to him seems to have a french manicure, or very shiny perfect nails.
Answer: He's a fraud and he's trying to impress people and create a reputation. Most of what he brags about is likely either made up or was actually done by someone else.
Jason Hoffman