Not every great athlete makes a great golfer. We’ve all seen it — the explosive basketball player who can’t find rhythm in their swing, or the track star whose foot speed doesn’t translate to clubhead speed. Athletic prowess alone isn’t enough; golf demands something different, something more nuanced.
Jackson Eells may be the exception to that rule.
A college baseball player with the kind of natural swing sequence that makes a coach’s job both easy and exhilarating, Jackson walked into my studio with all the raw ingredients of greatness. He had power — tremendous power — but it was wild and unrefined. His grip alignment 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 underneath, establishing a wide stance, allowing pressure to load into his trail foot during the backswing, and creating that crucial pressure shift before the downswing begins. Most importantly, we maintained his natural ability to achieve that classic impact position — upper body tilted, right elbow tucked — that power hitters know instinctively.
Once I identified these elements, the grip adjustment became obvious. We weren’t fighting against his athletic instincts; we were channeling them.
The Results
With a comfortable, repeatable setup in place, it was time to unleash what Jackson does best: swing hard.
In our most recent session, Jackson started at 138 mph of clubhead speed — already exceptional. But as we fine-tuned his setup and swing path, something remarkable happened. The speed climbed: 142… 145… and finally, 149 mph(!!).
To understand just how extraordinary Jackson’s speed is, consider these benchmarks:
Jackson’s 149 mph puts him:
- 34 mph faster than the average PGA Tour player
- 22+ mph faster than the fastest player on Tour (Niklas Norgaard)
- Faster than Bryson DeChambeau’s typical speeds, even after DeChambeau’s legendary transformation
- In elite long drive territory, competing with professionals who train specifically for maximum speed
It just goes to show that you can take the 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 foundation to get the most out of it.
TheStack + Stack Radar Bundle
Save over 15% when you combine TheStack + Stack Radar with our most popular bundle. Enjoy personalized speed training with TheStack, gamified wedge practice with Stack Wedging, Tour-caliber insights with Stack Putting, and 60+ instructional videos in the Learning Library – along with our Bluetooth-enabled Stack Radar, which sends your speed data directly to TheStack App for seamless training
Stack Radar is a great multi-purpose launch monitor that packs into your golf bag easily, making it perfect for speed training with TheStack, Stack Wedge practice on the range or indoors, and measuring your speeds on the course.
TheStack App – Speed Training, Wedging, and Putting
Rated 4.9 with over 5,500+ Reviews on the App Store
Includes 1-Year Membership to TheStack App
Now on iOS, Android (Beta), and Chrome Web (Beta)
Adaptive speed training formulated by Dr. Sasho MacKenzie
Guided workout timer for reps, sets, and rest intervals
Custom speed metrics to track your gains
Bluetooth Connectivity to integration devices. Hands-free data entry using voice entry technology for non-integrated devices
Membership includes Bundled access to Stack Putting (iOS), Stack Wedging (iOS), and the Learning Library (All Platforms)
Train and track up to twenty local (i.e. family) users under one login. App works with Family Sharing so the entire family can train easily on separate devices
Connect to any other Stacker using Share Codes
Are you a Coach? Learn about our Coaches License
TheStack Hardware
5 milled Stack weights enable 30 weight combinations between 0g and 300g
Dual-purpose weight case / phone stand
Precisely engineered training club – Adult (41.5″). For Junior sizing, see Fitting Juniors
Stack training requires a speed device that can measure swings without ball contact. This bundle includes our own Stack Radar. View all compatible devices here.
Stack Radar
Measures Swing Speed and Ball Speed. Calculates an estimated Carry Distance and Smash Factor. Can capture swing speed without ball contact
Powers Stack Wedging (iOS), our newest gamified practice feature. Enjoy Seriously Fun wedge practice indoors or outdoors and get accurate feedback regardless of range ball quality or practice environment conditions.
Pairs with TheStack App via Bluetooth to enable advanced features. Adjust for temperature and altitude while fine-tuning ball speed and launch angle for the most accurate feedback
Set speed trigger threshold at 25, 35, 45, or 55 mph to avoid false triggers from fast backswings
Includes a stylized carry case to protect the screen while stored (available exclusively for purchases from our website)
Platform Availability
iOS: Access TheStack App from the App Store when your order arrives. Requires iOS 15.0 or newer. Access Speed, Wedging, Putting, and the Learning Library. Android & Web (Beta): Install TheStack App from the Google Play Store or access it on Chrome Web when your order arrives. Access Speed + Learning Library today; Wedging + Putting coming in a future update.
See our FAQ pages for questions about membership access.
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