固定されたツイート
I'm pleased to announce that next week I'll be joining the Cleveland Guardians R&D team!
Thanks to everyone who has helped me to develop in the world of baseball analytics over the past few years.
English
Cameron Grove
1.2K posts
Cameron Grove
@Pitching_Bot
Cleveland Guardians R&D, interested in baseball analytics, former astrophysicist, based in London, UK
参加日 Temmuz 2019
178 フォロー中5.3K フォロワー
@s8mb Beyond the GPS tracking issues that others have mentioned, their estimated arrival times strongly underestimate the impact of traffic.
Something I explored here:
pitchingbot.com/busmodel.html
English
Why is bus data so unreliable in London? The supposed real time positions of buses are often completely wrong. How hard is it to stick a GPS tracker in every bus and make that public?
English
Cameron Grove がリツイート
We're looking for a data scientist to join us at the Cleveland Guardians R&D department!
I've really enjoyed working here with lots of great people for the past 2+ years. If you're interested in baseball analysis and solving tough problems with data then apply at the link below:
English
Cameron Grove がリツイート
The @CleGuardians are looking for a Biomechanics Analyst to join their Baseball R&D group. Apply here: boards.greenhouse.io/clevelandguard…
English
As I've left the public space, PitchingBot has a new home on FanGraphs.
fangraphs.com/leaders.aspx?p…
Check out the primer here if you want to know more about what goes on under the hood:
library.fangraphs.com/pitching/pitch…
English
Cameron Grove がリツイート
PitchingBot and Stuff+ Pitch Modeling Is Now on FanGraphs! blogs.fangraphs.com/pitchingbot-an…
English
@tangotiger Fair enough, I thought the graphs above avoided that by changing the samples to still include players on the "bad" side of random variation.
English
@Pitching_Bot Still a selection bias... see the two responses from readers describing the reason
English
This article is actually an excellent example of selection bias. Can someone out there articulate why I would conclude that?
Taiyo Keilin@TaiyoKeilin
@thechairman04 @tangotiger I think pulling Wheeler was the right call but maybe bringing in Alvarado wasn’t. I don’t know how the Phillies felt their other relievers matched up against Álvarez but it seems hitters gain an advantage the more they see a relief pitcher. baseballaheadinthecount.blogspot.com/2022/01/dont-l…
English
@levy_cameron @tangotiger @TaiyoKeilin @SassoCT I couldn't locate the wOBA graph, but here are home runs and Ks
English
@levy_cameron @tangotiger @TaiyoKeilin @SassoCT I agree the regular season results are mostly selection bias.
I redid some of the postseason analysis comparing to the odds ratio wOBA of the batter-pitcher matchup and there seemed to be something real there (didn't publish that though, I'll see if I can dig it out)
English
Cameron Grove がリツイート
This feels relevant
Alvarado vs Alvarez
baseballaheadinthecount.blogspot.com/2022/01/dont-l…
English
@VorosM Hard to say much.
Note that the Phillies game would have come under "Cloudy" using this definition of weather. Fastballs show a bit more of a significant change from clear -> cloudy compared to other pitches.
English
Effect of different weather conditions on pitcher command quality.
English
@whoeferbaseball I filtered all of those out but I agree it would make a good control group.
English
@Pitching_Bot That would be a great control group for the effects of weather and temperature; it theoretically removes a lot of the environmental variables that aren't 100% reflected here.
English
I didn't include snow in the first graph due to a small sample size, but the effect looks big even with a large error bar.
English
Pitcher command quality in different temperatures. Sweet spot from 55-70 degrees?
English
@tangotiger @Light_Saberist One could argue that hitters have more control over whether they pull flyballs than pitchers have over BABIP.
twitter.com/Pitching_Bot/s…
Whether the effect is significant enough to be worth including is another question.
Cameron Grove@Pitching_Bot
Also, batters have a reliable skill at getting their flyballs to fly further than the model expects when controlling for LA, EV, stadium, & weather. Year on Year R^2 = 0.2 for min. 50 flyballs which is small but significant. Here are the batters who gain/lose the most distance.
English
@Light_Saberist It's like saying "You know what's missing from FIP? BABIP. FIP is totally ignoring balls in play. Let's bring in BABIP."
Again, do you want to explain the play (wOBA or FIP + BABIP)? Or do you want to explain the player (FIP)?
English
#Statcast Someone was asking about launch data for Judge. I'll take more in-depth look later, but launch angle is easy enough to figure. Draw hypotenuse right underneath ball (see white blur). Then take arctan of opposite (103) over adjacent (189): 28.6 degrees. Actual: 28.3
English