matt dennewitz
@mattdennewitz.bsky.social
đź« Now: CTO Muck Rack Prev: Pitchfork, WIRED, them.us Global synth search: wigglehunt.com Baseball Observer: baseball.observer ex. pitchfork
We'll be converting all ticket sales to *late registrations* (at a higher fee) soon. Buy your tickets now! events.ticketleap.com/tickets/sabe...
Saberseminar 2026 - At Illinois Tech
Sabermetrics, Scouting, and the Science of Baseball is the premier baseball analytics event. We get front office insiders, scientists, scouts, and sabermetricians into the same room and have them talk...
events.ticketleap.com
There is, quite simply, no better or easier way to get your work seen by just about every team in the league. Do it!
Saberseminar@saberseminar.bsky.social · 4mo agoReminder: abstract submissions are open for Saberseminar 2026. We always aim for a mix of talks on a wide variety of subjects, from established professionals to hobbyists to students looking to get a foot in the door. Submit your abstract ASAP! docs.google.com/forms/d/e/1F...
thread of responses from MLB clubs w/r/t Venezuelan players/staff
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
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
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
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
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...
Imputing Arm Angles
Imputing Arm Angle from Readily Available Metrics Eno Sarris, Matt Dennewitz: Saber Seminar 2025 eno
docs.google.com
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...
singletonsgoingsteady.com
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
Even this undersells the value prop! If you enjoy this world a little or a lot, then subscribe.
your buddy Craig who works at 7-11 and is high all the time@cdgoldstein.baseballprospectus.com · 2y agoWe 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.
