Although early sabermetrics treated defense somewhat dismissively, better metrics for estimating defensive performance have emerged over the last few years. One of the oldest metrics is Defensive Efficiency (DE), created by Bill James, and this was improved by James Click in 2003 when he created Park-Adjusted Defensive Efficiency (PADE). This metric does a good job at evaluating team defense, and other metrics such as BP's FRAA, John Dewan's Plus/Minus system with Fielding Runs Saved (FRS), and Mitchel Lichtman's Ultimate Zone Rating (UZR) became available to evaluate individual player defense. However, I've begun to look at DE and PADE, and I discovered a rather peculiar observation.
Baseball Prospectus
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