Johnny Nienstedt
@JohnnyNienstedt
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Associate Analyst of Baseball Operations for the San Francisco Giants
San Diego, CA
Joined April 2022
I am incredibly excited to begin my baseball career as an Associate Analyst of Baseball Operations with the San Francisco Giants!
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Great research here! “…estimated overall familiarity impact is roughly three times as large as the estimated fatigue impact, while the estimated pitch-level familiarity impact is roughly twice as large as the estimated pitcher-level familiarity impact.”
How much of the times through the order penalty is familiarity and how much is fatigue? If familiarity, is it familiarity with a specific pitch, with the whole arsenal, or more? I dug into these questions with help from @Cran_Boy
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@JB_Rad619 @TooMuchMortons_ Not sure, but you’re definitely right. Sinker went from 17 & 9 to 16 & 11, fastball went from 10 and 14 to 11 and 13. Sinker getting more lift, fastball getting more run. Generally not a good thing.
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@JB_Rad619 @TooMuchMortons_ For sure. I don’t think of him as a deceptive guy but the model likes his slot effects a lot. From the way he gets great movement on the SI/CH I would guess he’s a pretty big pronator. Also would explain why he struggles to generate negative vert on the breaking balls.
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@dgerth1305 It’s a lot better on my laptop where I can actually rotate the plot but this snapshot gives you a pretty good idea
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@jaseidler The author already admitted that he wrote the article on a false premise because he believed negative RV on StuffPro was indicative of a poor grade. Not sure why the article and tweet are still up.
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@OrangeSportFan 4S is pretty bullish as well, grading him as a solid overall pitcher with no weak spots and a projected sub-4 ERA. This puts him right on the border of SP2 / SP3 which is great for a second year player! It also agrees that his low arm slot contributes a lot to his success.
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