SPECULATOR: Playing with QBaB leaderboards

Our Quality of Batted Balls (QBaB) metric, which debuted in the 2022 Baseball Forecaster, boils down the Statcast measures of exit velocity and launch angle 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:

 

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QBaB Leaderboard updated through July 28, 2022: QBaB Leaderboard 

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Last 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...

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