Not every great athlete makes a great golfer. We’ve all seen it—the explosive basketball player who can’t find rhythm in his swing, or the track star whose foot speed does not translate to club head speed. Athletic ability alone is not enough; golf requires something different, something more nuanced.
Jackson Eells may be the exception to this rule.
A college baseball player with the kind of natural swing sequence that makes a coach’s job easy and exciting, Jackson walked into my studio with all the raw ingredients of greatness. He had power—tremendous power—but it was wild and raw. The scope of his grip was off, and while he could generate impressive speed, control off the tee remained elusive.
The breakthrough came when I stopped trying to rebuild Jackson’s swing and started working with what he already knew. His baseball swing wasn’t the problem—it was the blueprint for the solution.
We rebuilt his setup around the mechanics that already worked for him: positioning his grip down, establishing a wide stance, allowing pressure to load into his leg during the backswing, and creating that crucial pressure change before the landing begins. Most importantly, we preserved his natural ability to achieve that classic hitting position — upper body tilted, right elbow tucked — that power hitters know instinctively.
Once I identified these elements, the grip arrangement became apparent. We weren’t fighting against his athletic instincts; we were channeling them.
The results
With a comfortable and repeatable setup in place, it was time to unleash what Jackson does best: swing hard.
In our most recent session, Jackson hit 138 mph head speed – already incredible. But as we tweaked his setup and path of movement, something remarkable happened. The speed increased: 142… 145… and finally, 149 mph (!!).
To understand just how incredible Jackson’s speed is, consider these benchmarks:
Jackson’s 149 mph fastball makes it:
- 34 mph faster than the average PGA Tour player
- 22+ mph faster than the fastest player in the tournament (Niklas Norgaard)
- Faster than typical Bryson DeChambeau speeds, even then DeChambeau’s legendary transformation
- In elite long drive territory, competing with professionals who train specifically for maximum speed
It just shows that you can take instincts from other sports and channel them into golf. All it takes is a little understanding of what your body does best and then tweaking your base to get the most out of it.
TheStack + Stack radar package
Collect hassle-free and save over 15%. This is our most popular bundle and includes everything you need to start your Stack journey. Enjoy personalized speed training with TheStack – including full access to Stack Wedges, Stack Putting and the Learning Library – along with our Bluetooth-enabled Stack Radar, which sends your data directly to TheStack app during training. Stack Radar is small, packs easily into your golf bag, and gives the added benefit of powering Stack Wedges and monitoring your ball speed and club distances. TheStack Hardware 5 milled Weight Stack enables 30 weight combinations between 0g and 300g Weight Box / Phone Stand Dual Purpose Multi-Designed Training Club – For Adults (41.5″). For youth measurements, see Adjusting the youth drill requires a velocity device that can measure swings without hitting the ball. We recommend stacking with Stack Radar (Bluetooth connection). See all compatible devices here. TheStack App – Speed Training, Wedges and Putts Rated 4.9 with over 4,400 reviews on the App Store Includes 1-year membership to TheStack App, accessible on iOS Fully customized and adaptive speed training formulated by Dr. Sasho MacKenzie, directed by Dr. integration devices. Hands-free data entry using voice input technology for non-integrated devices Membership includes bundled access to Stack Wedges, Stack Putting ($59 value) and Learning Library Training and tracking of up to twenty local (ie family) users under one login. The app works with Family Sharing so the whole family can easily train on separate devices Connect with any other Stacker using shared codes Stack Radar Record swing speed without hitting a ball – perfect for Stack speed training! Instant and easy Bluetooth connection exclusively with TheStack App Place the Stack Radar behind you on the range or course to measure Ball Speed Measures: Swing Speed and Ball Speed. Calculates an estimated carry distance and shock factor. Extremely accurate for ball speed. Powers Stack Wedges. Enjoy the serious fun practice Wedge that you can use indoors, outdoors, with premium balls or not – get great data regardless of your practice environment. Excellent performance indoors or outdoors. Set the speed threshold to 25, 35, 45 or 55 mph! Avoid false triggers due to a quick flashback. Includes radar pouch to protect screen during storage (available exclusively for purchase from our website). Access TheStack app from the App Store when your order arrives. Requires iOS 15.0 or later. See our FAQ pages for questions about membership access.
View Product
