Auto Out% (AO%) surgers…huh?! Yeah, I just made it up. But you know what this metric is because my colleagues have written articles about it. It’s simply strikeouts plus infield flies as a percentage of batters faced. These are essentially automatic outs, hence the name Auto Out%. We know that for pitchers, strikeouts are the best plate appearance result because it’s an almost guaranteed out. But infield fly balls aren’t too far behind in terms of out conversion. Yet, we focus far more on a pitcher’s strikeout rate than his popup rate, which is often completely ignored. Combining them gives us even better information than focusing on just one of the pair. So let’s find out which starting pitchers have improved their AO% the most versus 2017.
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