Joe's swing was purely natural, he was the perfect hitter. He batted against spitballs, shineballs, emeryballs and all the other trick deliveries. He never figured anything out or studied anything with the same scientific approach I gave it. He just swung. If he'd ever had any knowledge of batting, his average would have been phenomenal. … he seemed content to just punch the ball, and I can still see those line drives whistling to the far precincts. Joe Jackson hit the ball harder than any man ever to play baseball.
On Shoeless Joe Jackson, as quoted in Shoeless Joe and Ragtime Baseball (2008) by Harvey Frommer, p. 72