In my last article, I introduced a concept called "contact quality" which may indicate whether a pitcher can determine whether batted balls are easier or harder to field than expected. Contact Quality Average (CQA) is calculated by subtracting the pitcher's expected batting average on balls in play (BABIP) from the BABIP predicted by David Pinto's Probabilistic Model of Range (PMR). Since both approaches remove the effect of the defense by looking at league average conversion rates, CQA should also be defensive independent.
The Hardball Times
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