Back in 2017, I came up with a new metric for assessing players. I first called it “Positive Relative Outcomes” (PRO), but changed it to “Percentage Ratio Outcome” (PRO), to avoid associations with my relatives. You can go back for the details and early examples here and here.
By any name, the idea is to calculate the percentages of positive and negative outcomes of each plate appearance or batter faced—to be specific, for pitchers, Adjusted Batters Faced (ABF), which is Total Batters Faced minus bunts and Catcher Interference.
If you haven’t yet committed all of this to memory, along with how to extrapolate earned runs from ERA and innings and how much to tip your barista, positive outcomes for pitchers (negative for hitters)...
Almost!
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