I have been wanting to write about Steven Matz for some time, and this column is providing me with a reason to do so. Since Matz is coming off two good starts, I’m genuinely intrigued by what might be different for him lately, but he has been a curiosity all season.
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Over the last several weeks, I’ve scoured Baseball Prospectus’ PitchF/x leaderboards for the league’s underthrown pitches. We’ve covered two different pitch types each week starting with four-seam fastballs and sinkers in the first installment, cutters and curves in the second, and sliders and changeups last week. This week, we put it all together. Now that we’ve identified the most underthrown pitches, who should consider overhauling his entire pitch mix to make the most of his electric stuff?
Welcome back to the third and penultimate installment of Underthrown Pitches and the Pitchers Who Underthrow Them. Over the last several weeks, we’ve identified high performing four-seamers, sinkers, cutters, and curves and the pitchers who should consider throwing them more often. We’ve defined “high performing” based on a Pitch Score that factors an offering’s proclivity towards inducing whiffs, ground balls, and pop-ups. We’ve also defined the degree that a pitch is “underthrown” using a simple measure of pitch score to frequency.
For a more detailed recap of the results and methodology to-date, check out the previous installments linked below.