Justin Brantley

Postdoc at UPenn in @KordingLab.

[Justin Brantley @JABrantl]

What do you get when you cross professional baseball ⚾️with Bayes ? Bayesball! I am super excited to announce a new paper out with @KordingLab, titled "Bayesball: Bayesian Integration in Professional Baseball Batters" https://t.co/w6JmjlP7d7

[Ryan Yee @ryanyee98]

In our new paper https://t.co/uwAtDIaJwu , @skdeshpande91 and I develop a framework for estimating the optimal swing decision of batters in Major League Baseball. We take a Bayesian approach to estimating the expected runs following a swing and take decision. (5/7)

[Justin Brantley @JABrantl]

@paulgribble @KordingLab Yes, this is the version we adapted ours from. Its pretty much the same with sans serif throughout, our little dino in the bottom, and a few other minor things. I need to get it up on github for our lab anyways so i'll upload later today.

[Justin Brantley @JABrantl]

@rmhead @KordingLab fair haha

[Justin Brantley @JABrantl]

@Ronan_Denyer *decoding

[Justin Brantley @JABrantl]

@Ronan_Denyer as it turns out, I was in Houston from 2014-2020 and spent a lot of time at astros games… trust me, it wasn’t great news to find out that all that went down. but as it relates to the paper, despite being a fan, I did analyze the data from those games..

[Justin Brantley @JABrantl]

@Ronan_Denyer you should check out the data that @adams_at compiled for those games. super cool effort deciding the audio from those games https://t.co/T7dbiZjPkA

[Justin Brantley @JABrantl]

@Ronan_Denyer unfortunately the data weren’t consistent enough to show the effects we expected. some other folks analyzed the data and found that quite a few of the bangs were wrong. so basically it’s a lot of false positives/negatives mixed in with the correct bangs/no bang.

[Justin Brantley @JABrantl]

@IntuitMachine @KordingLab @nidhi_s91 @TBBake Also @nidhi_s91 is running her own lab now and is doing awesome movement work!

[Justin Brantley @JABrantl]

@IntuitMachine @KordingLab @nidhi_s91 @TBBake have played with YouTube data a bit more. I actually started this project with the hopes of using pose estimation on MLB youtube videos. It was more of a CV project before it was a movement project so we switched directions for that reason.

[Justin Brantley @JABrantl]

@pepe_uh @KordingLab But I think that means we have potential to dig deeper into this and write a few more papers down the line!

[Justin Brantley @JABrantl]

What do you get when you cross professional baseball ⚾️with Bayes ? Bayesball! I am super excited to announce a new paper out with @KordingLab, titled "Bayesball: Bayesian Integration in Professional Baseball Batters" https://t.co/w6JmjlP7d7

[Justin Brantley @JABrantl]

@pepe_uh @KordingLab Thanks, Pepe! There is definitely the issue that the pitcher's pitch selection is biased by the batters past behavior, so they are definitely not independent. Pitchers certainly try to exploit weaknesses. Situational batting and game strategy are missing from the current analysis

[Justin Brantley @JABrantl]

@tdverstynen @KordingLab @GunnarBlohm Yes! that paper is awesome. it’s really cool to see how they combined two seemingly disparate data sources in such a great way

[Justin Brantley @JABrantl]

@sNeuroble @KordingLab Thanks, stephanie!

[Justin Brantley @JABrantl]

@OliverRunswick @KordingLab @David_J_Harris Thanks! yes that would be great! feels like it is an area of serious untapped potential… at least that is what i’m banking on! 😂

[Justin Brantley @JABrantl]

@SandeepKishor13 I don’t know if the data are available for analysis, but I do think that conceptually this has to be some aspect of the playing strategy. same with tennis. I agree that racquetball is probably nearly all observation but i don’t know much about it other than playing occasionally

[Justin Brantley @JABrantl]

@richardfbetzel report, but he just couldn't resist those beautiful sliders.

[Justin Brantley @JABrantl]

@richardfbetzel I think it could give us an indication whether batters tend towards being biased away/towards the prior vs maybe those that swing freely based on what they see. Makes me think of Altuve in the 18-inning marathon striking out on 3 consecutive sliders. I'm sure he had the scouting

[Justin Brantley @JABrantl]

@richardfbetzel thanks! 🙏