Chapter 12: Researching Alternative Pitching Metrics
12.2.2 One Output Data Set with All the Splits Results
12.1 Overview
Our business users and most baseball analysts agree that quantifying the performance of pitchers is much harder than for batters, and our users want to investigate a number of alternatives.
Earned Run Average (ERA) has long been a default metric to evaluate pitchers despite its limitations. For starting pitchers, if they are replaced and the relief pitcher gives up a hit that scores any of the runners who are already on base, the starting pitcher is charged for those runs.
Likewise, if a relief pitcher allows “inherited runners” (i.e., those runners ...
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