2: Usain Bolt
A man whose inclusion in this list isn't likely to be contested by any fan who has their head screwed onto their shoulders, Bolt's achievements tell you all you need to know.
The fastest man in recorded history is a finely tuned running machine, and his success is made even more remarkable by the fact that he spent the majority of his youth trying to avoid training rather than putting his craft above all else.
To our knowledge there's only one man who's more naturally gifted than Bolt...
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