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That adds significant value — about ...
That adds significant value — about five runs above average per season, according to the researcher Mitchell Lichtman, who works as a consultant for the St. Louis Cardinals.
Evaluating Defense | U.S.S. Mariner
The most widely accepted system is Mitchel Lichtman's UZR.
It was initially introduced in 2003 in twoarticles over at Baseball Primer.
UZR numbers for 2000-2003 were then posted on TangoTiger's website, where they can still be found.
Complete numbers for 2004 and 2005 are not available, as Lichtman was hired by the St. Louis Cardinals and his work became proprietary data for their club.
He has released some UZR numbers for the past two years in different discussion threads at Baseball Think Factory, but for the most part, current UZR data is no longer public information.
David Gassko's way to tell if his system was "working" or not was to compare correlation to UZR, and Mitchel Lichtman
gave him enough data to compare between the two.
Baseball Time in Arlington: A Texas Rangers Blog - Home - The Ian Kinsler Question
The Hardball Times' Mitchel Lichtman recently published an in-depth study indicating that the year-to-year offensive performance of the modern-day baseball player typically crests around age 27-28, followed by gradual decline until around age 33 and then a slowly steepening decline in the seasons thereafter.
The guy who originally came up ...
The guy who originally came up with UZR, Mitchel Lichtman, now works for the St. Louis Cardinals.
As of now, Mitchell Lichtman's Ultimate Zone Rating is regarded as the best available defensive metric.However, the UZR statistic was only published for 2000-2003 because Lichtman was then hired by the St. Louis Cardinals, and the statistic because their property.UZR, like many other metrics, is based on a how many balls a player was able to catch within his "zone" and the parameters about the batted ball; its distance, direction, how hard it was hit, the type (ground, fly, etc.).