Are American fighters only marketable if they are undefeated?

By Hector Gonzalez: There is too much of an importance on being ‘undefeated’ for American fighters. It might be the Mayweather curse, where American fighters might need to be undefeated like Floyd Mayweather in order to be marketable. I think that it’s a curse. For international fighters, a couple of defeats don’t mean that much. […]