matt dennewitz
@mattdennewitz.bsky.social
🫠
Global synth search: wigglehunt.com
Baseball Observer: baseball.observer
Global synth search: wigglehunt.com
Baseball Observer: baseball.observer
Reposted by matt dennewitz
thread of responses from MLB clubs w/r/t Venezuelan players/staff
January 6, 2026 at 1:16 AM
thread of responses from MLB clubs w/r/t Venezuelan players/staff
Reposted by matt dennewitz
last effort: I run a baseball site with some of my best, smartest, and most talented friends. we do fun and engaging work all year long, and it's about to get more expensive to read that work as of 1/1. I'd much rather you get in the door as cheap as possible. It also makes for a great gift:
Premium Gift Subscription
Fill out the information above to purchase a gift subscription. An email will be sent to the recipient within two weeks letting them know. Complete access to BP’s premium editorial content Dozens of a...
baseball-prospectus.myshopify.com
December 23, 2025 at 11:46 PM
last effort: I run a baseball site with some of my best, smartest, and most talented friends. we do fun and engaging work all year long, and it's about to get more expensive to read that work as of 1/1. I'd much rather you get in the door as cheap as possible. It also makes for a great gift:
Reposted by matt dennewitz
NEW on Baseball Observer: search and publisher filtering.
Baseball Observer now supports semantic text search. Three modes are available: (hybrid) relevance, date (chrono > relevance), combined (relevance + chrono).
h/t @jenramose.online for nudging along search and other improvements
Baseball Observer now supports semantic text search. Three modes are available: (hybrid) relevance, date (chrono > relevance), combined (relevance + chrono).
h/t @jenramose.online for nudging along search and other improvements
December 23, 2025 at 9:45 PM
NEW on Baseball Observer: search and publisher filtering.
Baseball Observer now supports semantic text search. Three modes are available: (hybrid) relevance, date (chrono > relevance), combined (relevance + chrono).
h/t @jenramose.online for nudging along search and other improvements
Baseball Observer now supports semantic text search. Three modes are available: (hybrid) relevance, date (chrono > relevance), combined (relevance + chrono).
h/t @jenramose.online for nudging along search and other improvements
Reposted by matt dennewitz
Over the weekend I posted a little gift guide of rad artists, Chicago folks, and other things I like a lot. dansinker.com/posts/2025-1...
All Rad, No Bad | dansinker.com
dansinker.com
December 1, 2025 at 4:48 PM
Over the weekend I posted a little gift guide of rad artists, Chicago folks, and other things I like a lot. dansinker.com/posts/2025-1...
Reposted by matt dennewitz
These are all the slides and github repos from SaberSeminar that I've seen folks post so far. If anyone sees anything missing let me know and I'll add it to the doc! docs.google.com/document/d/1...
saberseminar 2025 public presentations
“Path Finder” - Conner Pelletier, Sam Ehrlich, Tanner Stokey https://drivelinebb-my.sharepoint.com/:p:/g/personal/sam_ehrlich_drivelinebaseball_com/EV1f3NJENzpPm3J_-9Q9VJ0BCFOkCI9MbbppiN4vN8GHyQ?rtime...
docs.google.com
August 26, 2025 at 6:15 PM
These are all the slides and github repos from SaberSeminar that I've seen folks post so far. If anyone sees anything missing let me know and I'll add it to the doc! docs.google.com/document/d/1...
Enormous thank you to @saberseminar.bsky.social for having @enosarris.bsky.social and myself to talk about imputing arm angles.
Our slides: docs.google.com/presentation...
Code: github.com/pitchingplus...
Our slides: docs.google.com/presentation...
Code: github.com/pitchingplus...
Imputing Arm Angles
Imputing Arm Angle from Readily Available Metrics Eno Sarris, Matt Dennewitz: Saber Seminar 2025 eno
docs.google.com
August 24, 2025 at 6:14 PM
Enormous thank you to @saberseminar.bsky.social for having @enosarris.bsky.social and myself to talk about imputing arm angles.
Our slides: docs.google.com/presentation...
Code: github.com/pitchingplus...
Our slides: docs.google.com/presentation...
Code: github.com/pitchingplus...
Reposted by matt dennewitz
Wrote up a couple of recipes on unstructured data extraction from MLB prospect ranking lists using LLMs. What used to be gory scraping work is now wonderfully simple.
Extract MLB Prospect Lists with LLMs — No Code Needed
I’ve been tinkering with an idea: a site that combines publicly available MLB prospect lists and lets you weight each outlet’s rankings however you like. The data is messy, and the means of acquisitio...
www.singletonsgoingsteady.com
June 14, 2025 at 2:50 PM
Wrote up a couple of recipes on unstructured data extraction from MLB prospect ranking lists using LLMs. What used to be gory scraping work is now wonderfully simple.
missed this in the polars docs: you can load a polars dataframe from pydantic. github.com/pola-rs/pola....
feat(python): support `DataFrame` init from `pydantic` model data by alexander-beedie · Pull Request #8178 · pola-rs/polars
Closes #8154.
This was a simple addition; pydantic model data is largely equivalent to @dataclass or NamedTuple data, which we already support. Only needed a few minor tweaks to leverage the existi...
github.com
March 6, 2025 at 7:33 PM
missed this in the polars docs: you can load a polars dataframe from pydantic. github.com/pola-rs/pola....
Even this undersells the value prop! If you enjoy this world a little or a lot, then subscribe.
We have an *incredible* value proposition and we're significantly below market in where we set our prices. Look around and see: We're cheaper than just about everything that isn't free, and we do it at a premium quality and with significant volume in terms of content. I want that to stay accessible.
November 20, 2024 at 9:55 PM
Even this undersells the value prop! If you enjoy this world a little or a lot, then subscribe.