10. Dock Ellis
It's not quite as badass as pitching a no-hitter with one arm (spoiler alert!), but pitching a no-hitter high on LSD is pretty fricking badass. Throw in a game in which Ellis intentionally hit three of the first five batters he faced (the fourth ducked and after two attempts at the head of the fifth, Ellis was removed from the game) and the illest corn rows in baseball history, and you've got an all-time badass.