SPECULATOR: Snap judgments with QBaB
Apr 14 2021
One of the many new additions to the 2021 Baseball Forecaster (and in the works here on the site) was Quality of Batted Balls (QBaB), a metric that boils Statcast measures of exit velocity and launch angle down to a simple three-digit code for every hitter. The original research from Arik Florimonte can be found here, and QBaB's A-F grade thresholds for exit velocity, launch angle, and launch angle tightness are shown below:
Earlier this year, Arik looked at how quickly QBAB scores for exit velocity became meaningful and found that for any sample size, a QBaB “A” for Exit Velocity (EV) is correlated with improved QBaB scores over the next 25 Batted balls (1-2 weeks), an "F" portends worse results, and a QBaB EV score of over 100...
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