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Stephen Sutton-Brown

@srbrown70.bsky.social

2.8K followers 120 following 1.7K posts

Braves, heat maps, cars, tractors, and music Creator of StuffPro and Arsenal Metrics at Baseball Prospectus He / him

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Stephen Sutton-Brown @srbrown70.bsky.social · Jan 17

I have never been more excited to release an article: Introducing BPro’s new Arsenal Metrics! www.baseballprospectus.com/news/article...

Introducing BP's new Arsenal Metrics | Baseball Prospectus

A new way at quantifying not just individual pitches, but how they work together.

www.baseballprospectus.com

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Stephen Sutton-Brown @srbrown70.bsky.social · 36m

anytime!

Stephen Sutton-Brown @srbrown70.bsky.social · 40m

just the model notation, it'll solve for a batter specific intercept to replace the 1

Stephen Sutton-Brown @srbrown70.bsky.social · 1h

of course, the model is set up as bat_speed ~ 1 + A*y_intercept + B*y_intercept^2 and I'm just solving for A and B by batter

Stephen Sutton-Brown @srbrown70.bsky.social · 2h

Averaged by pitcher. This isn't controlling for pitch type, but still some interesting names at the top and bottom. Reminder: negative values indicate the batter reduced their bat speed relative to what we'd expected given the swing's intercept point

Stephen Sutton-Brown @srbrown70.bsky.social · 2h

Difference in actual vs expected bat speed by pitch type. No surprises here: breaking and offspeed pitches fool batters

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Stephen Sutton-Brown @srbrown70.bsky.social · 2h

a collection of unique swings when modeling bat speed as a function of intercept point assuming constant jerk (thus a function of int and int squared)

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Stephen Sutton-Brown @srbrown70.bsky.social · 19h

If you model swings as having a constant jerk you can get around having to use a spline fit for bat speed vs intercept point. Useful because splines and GPs take way longer to fit with batter random effects

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Stephen Sutton-Brown @srbrown70.bsky.social · 1d

these are all so good

Stephen Sutton-Brown @srbrown70.bsky.social · 1d

great stuff from @jrodrigues39.bsky.social on managing familiarity in the postseason www.baseballprospectus.com/news/article...

Why Starters Are the True Weapons in October | Baseball Prospectus

Mystery functions differently than one might expect.

www.baseballprospectus.com

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Reposted by Stephen Sutton-Brown

Chris Hanel @chrishanel.com · 17d

a remix of a yoda meme:

after Sending out Treinen 37 times in a row while standing in front of the bullpen at 1:34 am

[picture of Dave Roberts looking dazed and confused]

2:12am... going back for more Treinen

[picture of Dave Roberts walking with a weird facial expression]

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Stephen Sutton-Brown @srbrown70.bsky.social · 2d

a pre-game meeting but instead of ppt slides of heat maps the dodgers fo showed him y'all's tweets

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Stephen Sutton-Brown @srbrown70.bsky.social · 2d

gonna go out on a limb and suggest snell pitch like this all the time

Stephen Sutton-Brown @srbrown70.bsky.social · 2d

Where PitchPro thinks Snell *should* target his pitches assuming he has an average miss distance of around a foot for each offering

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Stephen Sutton-Brown @srbrown70.bsky.social · 2d

that was the best. forgot a screw at one point and said "dadgummit" and told Georgia to wait while I go get it and she said "it ok, i gonna fix it for you, daddy"