Michael Bamberger has a good piece on Chipper Jones, professional craftsman, in the latest issue of SI. The story reminded me of just how difficult it is to play the game, as well as how hard it is to stay healthy once an athlete reaches his mid-thirties. The mental and physical grind is considerable, no matter how well-paid these guys are. But my favorite part concerns just how tricky it is to measure success, even for a sure-fire Hall of Famer. Numbers are so enlightening in baseball,...