Source: WSJ, Mar 2011
The most exciting development in baseball analysis right now is probably the development of Field f/x, a camera system that will record the position of the ball and all fielders at all times in every major-league park, thus once and for all solving the mysteries of which players are good at defense and which are bad. To tell how good Jackie Robinson was in the field, Mr. Humphreys has to deduce it from official records that can be unreliable or worse. To tell how good Mr. Jeter is, an analyst must deduce it from batted-ball data collected by human observers, which presents its own serious problems. A few years from now, however, telling how good a player is will be a matter of running his movements through an algorithm.