Chief of Staff, Driveline Baseball Driveline Dominican Republic, Opening Nov 2026
Kent, WA
Joined February 2024
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Emily Coolbaugh retweeted
Dick Williams hired me (Reds) and gave me full control over personnel, but advised me to do what was in the best interest of the club, not what was easiest for me.
I ultimately kept the entire staff for one full year, and inherited coaches like Elmer Dessens were absolute rockstars for me.
I could write a lot more about this and our approach from 2019-2021 that was wildly successful, but that's for another time. Suffice to say that I don't believe in wholesale regime change on day one, and I think it's usually a major mistake borne out of sheer laziness.
Attached is the Reds' audit I did in 2021 showing our Stuff+ ranks compared to other organizations. I'm proud of the work our team did from top to bottom - both new coaches and ones that bought in for the ride.
@halfkelly Beautifully edited and well executed. @drivelinekyle if an owner backed your vision how would you decide when to keep working on buy in with existing staff and when to bring in new people? Loved your approach with the Reds coach.
Emily Coolbaugh retweeted
This report is inaccurate for several reasons.
1) I never worked in Player Development for Boston.
2) My job over 2.5 years was to build the Baseball Sciences department and to advise Breslow mainly on R&D initiatives.
3) Only reason I'm not in Boston anymore is due to working for an ownership group in NPB which is a conflict of interest of continuing work in MLB; wasn't possible to do both (sadly).
I still support the Red Sox and Craig's vision for the organization.
Emily Coolbaugh retweeted
Good command doesn't guarantee good results.
A targeting problem shows up when the data says a pitcher is hitting his spots, but the location results are still below average.
It also works the other way: some pitchers have lower command but better location grades because they're aiming at better spots.
Emily Coolbaugh retweeted
Some early estimated workload modeling confirms what @brewerhendrix mentions below
A higher level of throwing fitness allows for the this to be pulled off safely
Emily Coolbaugh retweeted
The Marlins are running one of the most interesting side quests in baseball right now
Their best starters are also their highest-leverage relievers?
Let's talk about it 🧵
Emily Coolbaugh retweeted
We're Hiring!
Looking for Hitting Coaches for our Dominican Republic location 🇩🇴
Apply today ➡️ teamworkonline.com/baseball-…
Emily Coolbaugh retweeted
An early flip up is usually linked to early torso rotation. But what if that’s not always the case?
It can also be linked to early supination of the throwing hand in the takeaway phase.
Emily Coolbaugh retweeted
Horizontal Attack Angle vs Horizontal Bat Angle
HAA — the direction the barrel is moving
HBA — the direction the barrel is facing
🧵how these interact to influence ball flight
Emily Coolbaugh retweeted
Coby Mayo Outlier Bat Path
Mayo has the most pull-side Attack Direction in the MLB
He also has one of the most vertical Bat Paths — a very unique combination
🧵Some relatively simple adjustments could significantly reduce his whiffs & ks
Emily Coolbaugh retweeted
Driveline's R&D team presented a new bat path model at Saberseminar.
Trained on 35,000 swings from 700+ athletes in the Launchpad, validated against MLB data.
It grades every swing on the offensive value it produces - contact quality, plane, and arsenal coverage. Then it generates every swing variation a hitter could take and finds the one that fits their body and training history best.
Not a fantasy swing. A realistic target.
Emily Coolbaugh retweeted
On the new bat path tooling we've demonstrated to great effect at Saberseminar - reps from multiple MLB teams loved the research and talked about how we're pacing the field.
Maybe a pause is in order... 🤔
Driveline's R&D team presented a new bat path model at Saberseminar.
Trained on 35,000 swings from 700+ athletes in the Launchpad, validated against MLB data.
It grades every swing on the offensive value it produces - contact quality, plane, and arsenal coverage. Then it generates every swing variation a hitter could take and finds the one that fits their body and training history best.
Not a fantasy swing. A realistic target.
Emily Coolbaugh retweeted
Sunday Side Sessions: Starter v. Reliever Workload
By better understanding the demands of the season, we can better prepare pitchers in the offseason
Emily Coolbaugh retweeted
Cole Carrigg has been electric to start his MLB career with the @Rockies, but stands with the most to gain with a slight path change - a lower entry and a steeper plane for him can help lead to more productive outcomes as a LHH.
But why?
Emily Coolbaugh retweeted
Founding member of the #GetBetterClub cracking the AAA whiff leaderboard last night - 5K's in 5IP
17K in 14.2 IP since the promotion to Round Rock
Makes sense when you see his #Mix and #Match
