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
Stack seamlessly and save over 15%. This is by far 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 while training.
Stack Radar is small, packs into your golf bag easily, and gives the added benefit of powering Stack Wedges and monitoring your ball speed and club distances.
TheStack Hardware
5 milled Stack weights enable 30 weight combinations between 0g and 300g
Dual-purpose weight case / phone stand
Highly engineered training club – Adult (41.5″). For Junior sizing, see Fitting Juniors
Stack training requires a speed device that can measure swings without ball impact. We recommend bundling with Stack Radar (Bluetooth connectivity). View all compatible devices here.
TheStack App – Speed Training, Wedges, and Putting
Rated 4.9 with over 4,400 Reviews on App Store
Includes 1-Year Membership to TheStack App, accessible on iOS
Fully customized and 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 both Stack Wedges, Stack Putting ($59 value), and the Learning Library
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
Stack Radar
Capture swing speed without hitting a ball – perfect for Stack speed training!
Instant and easy Bluetooth connection exclusively to TheStack App
Place Stack Radar behind you on the range or course to measure Ball Speeds
Measures: Swing Speed and Ball Speed. Calculates an estimated Carry Distance and Smash Factor. Incredibly accurate for ball speed.
Powers Stack Wedges. Enjoy Seriously Fun Wedge Practice that you can use indoors, outdoors, with premium range balls or not – get great data regardless of your practice environment.
Superb performance indoors or outdoors.
Set speed trigger threshold at 25, 35, 45, or 55 mph! Avoid false triggers due to a fast backswing.
Includes radar pouch to protect the screen while stored (available exclusively for purchases from our website).
Access TheStack App from the App Store when your order arrives. Requires iOS 15.0 or newer.
See our FAQ pages for questions about membership access.
View Product
