TheStack Baseball

⚾ Your Personal Trainer for Bat Speed 🧠 Built in a PhD research lab 💪 Proven by Pros 📱 AI-Optimized Speed Training

[TheStack Baseball @stack_baseball]

Sweet insight into how some of our most active Pro Stackers are seeing their bat speed gains translate to on field performance 💪

[TheStack Baseball @stack_baseball]

We’re proud to announce that The Stack Bat is now available in select Dick’s House of Sport locations across the country.

Now you can access the same bat speed training protocols being adopted at the highest levels of the game.

The future of bat speed training is here—available to athletes of all ages and skill levels.

[TheStack Baseball @stack_baseball]

"We were able to get into our first All-Star game and I think TheStack had a lot to do with it."
-Brendan Donovan

[TheStack Baseball @stack_baseball]

Brendan Donovan has been using TheStack for over a year to build real, measurable bat speed gains.

After his first program last year, he saw a +4 mph increase in bat speed on his way to his first All-Star Game.

Good things happen when you trust the science & dedicate yourself to the craft.

Donnie works hard, stays consistent, and we couldn’t be more proud to have him on board as an official Stack Athlete!

[MLB Now @MLBNow]

"I love every bit of it."

@CliffFloyd30 is all in on the analytic focus of improving bat speed after seeing what hitting coach David Popkins has done with the Blue Jays.

[TheStack Baseball @stack_baseball]

The next step is having players understand how to efficiently increase their bat speed. The science of speed matters. Good thing we know a guy… @SashoMacKenzie

[Brent Rooker @Brent_Rooker25]

The fact that the idea of “swinging the bat faster is better” is considered new age analytical thinking is insane.

Gaining speed/power/force production has been beneficial for every athlete in every sport since the beginning of time.

Pitchers who throw harder have higher ceilings, golfers who swing the club faster have higher ceilings, running backs who run faster have higher ceilings, basketball players who jump higher have higher ceilings etc.

Does it mean that those who are bigger/faster/stronger will automatically be better? Of course not. Skill, mental makeup, competitive edge, preparation and a thousand other things all play a massive part in overall success, but the fact that being more physically explosive and producing more force gives you a greater chance for success has always and will always be true.

[Michael Richards @EAPerformance_]

@TheStackSystem is hands down one of the best training tools I’ve found in 20 years.

[Trey Hannam @TJHannam10]

Brendan Donovan is having his best season yet.

He’s locked in on a great mindset:
“Warm up to hit — don’t hit to warm up.”

- He trains movement patterns to gain speed without losing the swing that makes him elite

[Trey Hannam @TJHannam10]

Brendan Donovan bat speed training with 'The Stack'

Also, does movements in weigh troom to increase speed within his swing, without losing his swing.

[Tangotiger 🍁 @tangotiger]

#Statcast Aging Curve for Swing Speed (updated with 2025 data)

I also included quasi-best-fit line, which you can play around with as more data comes in. This line in vertex form (which is much much much easier to understand than off-putting quadratic):

-.02*(Age - 25.5) + 72

[Cardinals Player Development @CardsPlayerDev]

INF César Prieto goes opposite field for a 3-run blast to extend the Redbirds' early lead.

[Cardinals Player Development @CardsPlayerDev]

OF Bryan Torres launches his first career Triple-A home run.

Last year's Texas League batting champion is 3-for-3 on the day and has hits in 4 of his first 6 at-bats this year.

[Lance Brozdowski @LanceBroz]

Pete Crow-Armstrong's average bat speed...

2024: 70.6 mph
2025: 74.5 mph

1 mph of added bat speed is ~6 feet of batted-ball distance.

Batted balls w/ 74-75 mph bat speeds produced 134 more points of SLG than those 70-71 mph last year. 👀 @WatchMarquee

Wheels up! 📈

[Chris Davis @cdavis8hits]

Bat speed sets your ceiling

[Trey Hannam @TJHannam10]

Bobby Witt Jr: What do you use for your mental game?

• I look at my bat, find a little focal point, take a deep breath + say something like ‘IT’S TIME’ to get the juices flowing

• Having a consistent preparation routine in dugout, on-deck & in the box each day

[TheStack Baseball @stack_baseball]

Stack Bat Sizes - Pro & Youth

[TheStack Baseball @stack_baseball]

@CalebBounds36 @TheStackSystem 💪

[TheStack @TheStackSystem]

Barrel speeds everywhere are trending up 📈⚾️, thanks to @stack_baseball!

Stage 5 FOMO? Here you go: https://t.co/evJSOvaM0x

[TheStack Baseball @stack_baseball]

Get Started with Stack Baseball

[TheStack Baseball @stack_baseball]

@danpadilla51 Have them train for bat speed on the days they are not with you. Monitor their data & review in person if needed. When you’re with the hitter, focus on mechanical improvements, bat to ball skills, mental approach, and take as many live ABs as possible.