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Wednesday, September 15, 2010

B-R.com’s updated park factors

By Tangotiger, 01:55 PM

Sean uses a three-year average, where the current year is the middle of the three years.  Since we won’t know the best estimate of the 2010 park factors until after the 2011 season is over, he is using only 2008-2009.  I don’t have a big problem with this… just a small one.

However, I want to comment on Sean saying this:

Seattle has been much more of a pitcher’s park than previously

“Has been”.  I’m sure Sean wasn’t looking for precision in his statement here, so let’s be precise here:

“The performances by Seattle players and their opponents at Safeco and away from Safeco in 2010 indicates to us that Safeco is a bit more of a pitcher’s park than we otherwise thought.  This applies not only for our understanding of Safeco this year, but for all other years, to some extent.  Our estimate of the pitcher friendliness of a park, for this year, and past years, changes as more games are played.”

If the net result of this is that Yankee Stadium is in fact more of a hitter’s park than we previously estimated, and that Safeco is more of a pitcher’s park, then this means CC has pitched better than we previously estimated, and Felix not as much, to the point that the two may in fact be equals.

(12) Comments • 2010/09/17 • SabermetricsParks
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September 15, 2010
B-R.com’s updated park factors