Marciano fought like 4 guys(at the most) who were legitimate challengers although every single one was at least half shot, and not one great current HW. Chavez Sr could have retired at almost 100-0 after having been a dominant champion for a good while, but nobody would really consider that to be a championship record by any means. Why is Marciano treated so differently, just because he retired? Floyd has already destroyed his record, as have many many others.