Pitchf/x Page Fixes

Just some quick notes on the 2010 pitchf/x data:

– There appears to be some new pitch type categorizations that were breaking some pitchf/x pages. There is EP (Eephus Pitch), SC (Screwball), KC (Knuckle Curve) and FO (Forkball).

– SC and FO I have temporarily lumped into FT (Two-Seam Fastball). I’ve been explained that screwballs (and possibly forkballs) are not really two seam fastballs, but there have been a total of 19 screwballs thrown this year, 18 of them by Daniel Ray Herrera and then the other one was thrown by Dallas Braden. There have been 12 Forkballs thrown, 8 by Livan Hernandez and 4 by Kenshin Kawakami. Overall, these two pitches didn’t seem to warrant their own category, but I can be convinced otherwise.

– Eephus pitches (EP) I have lumped into the UN (Unknown) category. Vicente Padilla has thrown all 16 of them.



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David Appelman is the creator of FanGraphs.


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Rick
Guest
6 years 5 months ago

David, I’m curious why you chose to lump SC and FO with FT. In terms of velocity, break and usage I would think they’d be more similar to CB or CU. Or is that assumption wrong?

gnomez
Guest
gnomez
6 years 5 months ago

A screwball breaks the opposite way from a curve or cutter.

Rick
Guest
6 years 5 months ago

And I’ve noticed Aaron Harang has 28.6% of his pitches listed as unclassifiable. He has not changed his repertoire unless you consider his slider’s severe degradation. Bad data? Bad classification?

smh
Guest
smh
6 years 5 months ago

My understanding has always been that a forkball is very similar to a splitter, and a screwball is a changeup with a lot of horizontal break (moves down and in on same-handed hitters)

I guess eephus pitches could be considered very slow changeups…

TJ
Guest
TJ
6 years 5 months ago

For the sake of accuracy, and my love of uncommon pitch types, I think all 4 warrant their own category.

Mike Fast
Guest
6 years 5 months ago

Herrera’s screwball is a slower changeup with extra drop. I’d put it either with the changeups (probably) or with the curveballs (probably not). A 65-mph pitch shouldn’t be lumped in with fastballs. Same thing for Braden’s screwgie, if in fact he’s thrown it in the majors.

The forkball also should either go with the changeups or the splitters. It’s just a slower-spinning changeup. Some splitters are that also–slower spinning changeups–and some are thrown with more normal spin rate. So I’d probably put it with the changeups, but I could see the logic behind putting it with the splitters, too.

Mike Fast
Guest
Mike Fast
6 years 5 months ago

TCQ, I agree. It functions like a super-slow changeup for Herrera, but presumably he’s twisting his wrist on release, which is not a changeup feature, of course.

Sometimes I think Pedro’s changeup looks a little like a screwgie. I’d love to see what some of the older screwball pitchers would have looked like on PITCHf/x. Mecir just missed out. Braden I’ve never seen evidence that he threw one in the majors, although I haven’t looked recently.

TCQ
Guest
TCQ
6 years 5 months ago

Well, a screwball is kind of just an exaggerated (very exaggerated, of course) changeup in wrist action, so someone like Pedro could easily have thrown something that would function as a cross – which could be a really nasty pitch, I’d bet.

Mike Fast
Guest
6 years 5 months ago

The “eephus” that Padilla is throwing is really just a big slow curve. I guess MLBAM’s neural net is matching it to the El Duque eephus because of the slow speed, but even a 60-mph slow curve isn’t quite as slow as the 50-mph El Duque eephus pitch.

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