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May 14, 2013 8:11 am
How long fielding stats take to stabilize.
A little more than a week ago, Jon Heyman of CBS sent out a tweet wondering why it was that Starling Marte and Bryce Harper had the same WAR. Heyman was quoting Baseball-Reference's version of WAR, which at that moment in time showed Marte and Harper tied at 1.7 wins. Harper had clearly been the superior hitter, but drilling down, it turned out that the fielding metric used by Baseball-Reference loved Marte's defense enough (and thought Harper's was average enough) to call them equals.