Stephen Sutton-Brown
@srbrown70.bsky.social
Braves, heat maps, cars, tractors, and music
Creator of StuffPro and Arsenal Metrics at Baseball Prospectus
He / him
Creator of StuffPro and Arsenal Metrics at Baseball Prospectus
He / him
Pinned
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
I have never been more excited to release an article: Introducing BPro’s new Arsenal Metrics! www.baseballprospectus.com/news/article...
Reposted by Stephen Sutton-Brown
WAM had @robarthur.bsky.social run a report for us that found that fielders in stadiums with closed roofs were, on average, positioned a foot closer to where fly balls landed than in outdoor venues. Theoretically, you could use WAM's data to position your fielders better and save a few runs a year.
January 5, 2026 at 7:10 PM
WAM had @robarthur.bsky.social run a report for us that found that fielders in stadiums with closed roofs were, on average, positioned a foot closer to where fly balls landed than in outdoor venues. Theoretically, you could use WAM's data to position your fielders better and save a few runs a year.
Reposted by Stephen Sutton-Brown
between vacation and holidays i haven't worked since dec 10th and am now extremely frustrated at dec 10th stephen for not documenting a damn thing about where he left off on anything
January 5, 2026 at 4:47 PM
between vacation and holidays i haven't worked since dec 10th and am now extremely frustrated at dec 10th stephen for not documenting a damn thing about where he left off on anything
Someone get Tommy Pham a BPro sub (s/o @enosarris.bsky.social for walking through DRC+ in the piece)
www.nytimes.com/athletic/694...
www.nytimes.com/athletic/694...
Tommy Pham makes his case for MLB’s next big metric: He calls it PhamGraphs
Pham proposes a statistical system that would account for how often a hitter faces high-leverage relievers and how defenders cope with wind.
www.nytimes.com
January 5, 2026 at 3:56 PM
Someone get Tommy Pham a BPro sub (s/o @enosarris.bsky.social for walking through DRC+ in the piece)
www.nytimes.com/athletic/694...
www.nytimes.com/athletic/694...
in the year of our lord 2026 at the age of 34 i have received my 70th star and ascended the endless staircase in peach's castle. tomorrow i'll attempt to defeat bowser
January 4, 2026 at 3:32 AM
in the year of our lord 2026 at the age of 34 i have received my 70th star and ascended the endless staircase in peach's castle. tomorrow i'll attempt to defeat bowser
Reposted by Stephen Sutton-Brown
Had an interesting, hard interview with @adamconover.net on his podcast. I think he is a great example of a smart AI skeptic.
My main messages were that AI is a really big deal, it has good & bad impacts, and that, by sitting things out, skeptics can’t guide use. open.spotify.com/episode/5cFK...
My main messages were that AI is a really big deal, it has good & bad impacts, and that, by sitting things out, skeptics can’t guide use. open.spotify.com/episode/5cFK...
An AI Expert Challenges an AI Skeptic, with Ethan Mollick
open.spotify.com
January 1, 2026 at 9:37 AM
Had an interesting, hard interview with @adamconover.net on his podcast. I think he is a great example of a smart AI skeptic.
My main messages were that AI is a really big deal, it has good & bad impacts, and that, by sitting things out, skeptics can’t guide use. open.spotify.com/episode/5cFK...
My main messages were that AI is a really big deal, it has good & bad impacts, and that, by sitting things out, skeptics can’t guide use. open.spotify.com/episode/5cFK...
my year in review:
-favorite year yet w/ the girls, they're the best
-started journaling, helped me feel like i was soaking the parenting journey in more
-hiked machu picchu!!
-drove the mustang more than i have in a decade
-read more and walked more
-so much cool baseball work!
-favorite year yet w/ the girls, they're the best
-started journaling, helped me feel like i was soaking the parenting journey in more
-hiked machu picchu!!
-drove the mustang more than i have in a decade
-read more and walked more
-so much cool baseball work!
December 31, 2025 at 9:09 PM
my year in review:
-favorite year yet w/ the girls, they're the best
-started journaling, helped me feel like i was soaking the parenting journey in more
-hiked machu picchu!!
-drove the mustang more than i have in a decade
-read more and walked more
-so much cool baseball work!
-favorite year yet w/ the girls, they're the best
-started journaling, helped me feel like i was soaking the parenting journey in more
-hiked machu picchu!!
-drove the mustang more than i have in a decade
-read more and walked more
-so much cool baseball work!
Reposted by Stephen Sutton-Brown
I've been bothering you about signing up for BP before our price increase happens (tomorrow! sign up today!!) but the good news is, I can now also bother you hocking our book! The BP Annual is available to preorder from our distributor, bookshop, amazon, B&N, etc.
Order the 2026 Baseball Prospectus Books! | Baseball Prospectus
Baseball Prospectus 2026 Click here to order the paperback edition directly from our distributor Click here to order the paperback edition from Bookshop.org Click here to order the paperback or hardco...
www.baseballprospectus.com
December 31, 2025 at 4:33 PM
I've been bothering you about signing up for BP before our price increase happens (tomorrow! sign up today!!) but the good news is, I can now also bother you hocking our book! The BP Annual is available to preorder from our distributor, bookshop, amazon, B&N, etc.
Reposted by Stephen Sutton-Brown
i’m going to intentionally wait until the new year to sub so i can give BP more of my money, and i’d love to get someone else set up with a subscription as a belated holiday gift.
all you have to do is reply here with your favorite player who never posted a wRC+ over 100 in MLB.
let it rip!
all you have to do is reply here with your favorite player who never posted a wRC+ over 100 in MLB.
let it rip!
you have one more day to do this, and I really think you should
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:
December 30, 2025 at 7:06 PM
i’m going to intentionally wait until the new year to sub so i can give BP more of my money, and i’d love to get someone else set up with a subscription as a belated holiday gift.
all you have to do is reply here with your favorite player who never posted a wRC+ over 100 in MLB.
let it rip!
all you have to do is reply here with your favorite player who never posted a wRC+ over 100 in MLB.
let it rip!
Reposted by Stephen Sutton-Brown
One of my goals when I set out to write more seriously in 2025 was to produce things that I was interested in and thought about a lot.
Being out of Pro Ball give me a chance to think about the game as an outsider again which was a fun experience.
Here the articles I had the most fun writing 🧵
Being out of Pro Ball give me a chance to think about the game as an outsider again which was a fun experience.
Here the articles I had the most fun writing 🧵
December 30, 2025 at 4:17 PM
One of my goals when I set out to write more seriously in 2025 was to produce things that I was interested in and thought about a lot.
Being out of Pro Ball give me a chance to think about the game as an outsider again which was a fun experience.
Here the articles I had the most fun writing 🧵
Being out of Pro Ball give me a chance to think about the game as an outsider again which was a fun experience.
Here the articles I had the most fun writing 🧵
late night null result: had a theory that the time thru the order penalty would be larger the second, third, or fourth times a batter faces that pitcher that season, but that doesn't appear to be the case
December 30, 2025 at 3:49 AM
late night null result: had a theory that the time thru the order penalty would be larger the second, third, or fourth times a batter faces that pitcher that season, but that doesn't appear to be the case
i'm again plugging the IL ledger, it's so unbelievably helpful www.baseballprospectus.com/baseball-pro...
Baseball Prospectus Injured List Ledger | Baseball Prospectus
Injury Timeline Tool The Injury Timeline Tool and the IL Team Totals show the number of days missed rather than games. IL Team Totals Note regarding WARP Missed: WARP calculation is based on proj...
www.baseballprospectus.com
December 30, 2025 at 1:52 AM
i'm again plugging the IL ledger, it's so unbelievably helpful www.baseballprospectus.com/baseball-pro...
first day back home and i've already texted one neighbor about some loose siding and another about what appears to be a leaky drain pipe
December 29, 2025 at 2:52 PM
first day back home and i've already texted one neighbor about some loose siding and another about what appears to be a leaky drain pipe
and the christmas car haul
December 28, 2025 at 9:58 PM
and the christmas car haul
final christmas book haul
December 28, 2025 at 9:57 PM
final christmas book haul
elite road tripping performance, folks have rarely seen this quality of highway trucking
December 28, 2025 at 4:59 PM
elite road tripping performance, folks have rarely seen this quality of highway trucking
contemplative augie
December 26, 2025 at 10:30 PM
contemplative augie
some belated christmas pictures, this just keeps getting more fun each year. especially fun as the girls' personalities become more different and interests more distinct
December 26, 2025 at 7:58 PM
some belated christmas pictures, this just keeps getting more fun each year. especially fun as the girls' personalities become more different and interests more distinct
shockingly accurate
December 24, 2025 at 7:05 PM
shockingly accurate
Reposted by Stephen Sutton-Brown
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:
the girls' ability to play well with each other increases at the same rate as their ability to argue with each other
December 21, 2025 at 8:47 PM
the girls' ability to play well with each other increases at the same rate as their ability to argue with each other
I wrote four pieces this year, and I'm very proud of each of them. The Saberseminar one stands out, because of how much went into it, but grateful for the chance to publish each:
www.baseballprospectus.com/author/sbrow...
www.baseballprospectus.com/author/sbrow...
December 19, 2025 at 9:43 PM
I wrote four pieces this year, and I'm very proud of each of them. The Saberseminar one stands out, because of how much went into it, but grateful for the chance to publish each:
www.baseballprospectus.com/author/sbrow...
www.baseballprospectus.com/author/sbrow...
Reposted by Stephen Sutton-Brown
This is a fun perspective on a pitcher, based on a custom report we did for ... a pitcher. Yes, if you are a pro or aspiring pro, you or your reps can reach out and we are happy to help do assessments based on public data or your own data you've collected and have license to use.
Splits like this are such interesting puzzles to solve, but for a guy like him I think it's fair to bet he'll figure it out vs righties and be able to put together a solid season.
December 19, 2025 at 7:09 PM
This is a fun perspective on a pitcher, based on a custom report we did for ... a pitcher. Yes, if you are a pro or aspiring pro, you or your reps can reach out and we are happy to help do assessments based on public data or your own data you've collected and have license to use.
Good time of year too to plug Baseball Observer from @mattdennewitz.bsky.social baseball.observer
Baseball Observer
Earth's greatest aggregator of baseball news, research, analysis, and more.
baseball.observer
December 19, 2025 at 7:11 PM
Good time of year too to plug Baseball Observer from @mattdennewitz.bsky.social baseball.observer