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THE BOOK--Playing The Percentages In Baseball

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Wednesday, February 23, 2011

Has there been a change in GB hit at some point in the late 60s?

By Tangotiger, 02:31 PM

Carson does some good work here.

There are a few potential biases that should be addressed.  I don’t know if Carson wants to do it, but someone here must want to flex his saber muscles anyway.

1. How does it look at the park level?  Are new parks contributing to the change?

2. Can we even treat the recorded data of putouts and assists as valid?  I propose looking at Dodger event files, as those are likely the strongest in terms of validity.

3. Is there a shift in talent between infield and outfield such that the conversion of outs ratios to GB% is not constant?

4. Is there a change in fielding equipment, pitching repertoire, batting proficiency that will lead to more or less ground outs?

5. Others?

***

In another thread, I proposed treating 44% of all singles hit as GB, 12% of all doubles as GB and 7% of all triples as GB.  If we use those, does that give us a better estimate of GB% for where we have known data (and therefore allow us a better way to extrapolate for where we don’t have known data)?

(18) Comments • 2011/02/24 • SabermetricsBatted_BallHistory
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February 23, 2011
Has there been a change in GB hit at some point in the late 60s?