http://web.mit.edu/~xsdg/Public/papers/himcm-2003.pdf "The width is the distance between foul poles... the Twins’ field width (473.9 ft) and the Braves’ field width (470.2 ft) is not significant. However, the difference between the Rockies’ and Yankees’ field widths (492.9 ft and 446.9 ft, respectively) is very significant."
