Garrett Pierson
Founder, PracticeCaddie
Garrett Pierson is the founder of PracticeCaddie and its sister app BallCaddie. A software entrepreneur of 17 years — he previously founded Shopper Approved and scaled it past 100 million reviews — he brought the same data-driven approach to his own game. An 8.5-handicapper, he built PracticeCaddie to replace aimless range time with practice grounded in motor-learning research. He reviews and edits every guide here against that research. PracticeCaddie is independent — no affiliate kickbacks from manufacturers.
What I cover
- golf practice
- golf instruction
- motor learning
- strokes gained
- skill acquisition
How guides on this site get made
Reviewed against the research
Garrett reviews and edits every guide here against the motor-learning research it cites. A guide that fails the fact-check review does not publish until the flags are resolved.
Brand-neutral
Every drill is selected on motor-learning merit, not affiliate kickbacks or club endorsements. PracticeCaddie takes $0 from manufacturers and runs no affiliate links.
Truth over hype
We don't promise strokes. We deliver structure, data, and the research behind it. When research conflicts with conventional range wisdom, we go with the research.
More detail in our editorial standards and about page.
Latest from Garrett Pierson
- What Is a Shotgun Start in Golf? The Rule, the Field Math, and Hole 14
144 players finish in about five hours on a shotgun start against ten and a half on tee times, and the saving is the field's, not yours. The Rule and the math.
- Golf Glove Size Chart: What the Brands Actually Publish
Nike's own men's chart puts a hand of 3.21 and 8.25 inches into five of its six sizes. Three brands measure three different things, so the glove decides.
- How to Clean Golf Clubs: The Method, and What Dirt Costs You
Three launch-monitor tests measured what a dirty or wet clubface costs: 2,093 to 3,464 rpm of backspin. That is more than 125 rounds of groove wear takes.
- Wedge Loft Chart: Pitching, Gap, Sand, and Lob Wedge Lofts
A game-improvement pitching wedge can be 40 degrees, leaving 16 degrees of loft between it and a sand wedge. Three wedges fill that span, not one.
- Driver Loft Chart: What Loft Driver Should You Use?
Attack angle moves the driver loft you need as far as 25 mph of clubhead speed does, and almost every amateur hits down. Where to start, by the numbers.
- Golf Swing Weight Explained: What D2 Actually Means
D2 means 217 ounce-inches about a point 14 inches down the grip. Work from that and you can price a strip of lead tape in points on any club in the bag.
- Aerated Greens: Why Courses Punch Them, and How to Putt on Them
One coring pass touches between 1.23% and 30.68% of a green, and ball roll drops about 7% for 14 days. The tine and its spacing decide which end you get.
- Cavity Back vs Blade Irons: The Toe Miss Decides It
Sixteen current #6 iron heads. Blades and cavity backs overlap on MOI, and the spec that separates them is how far the centre of gravity sits from the hosel.
- Steel vs Graphite Iron Shafts: What the Testing Actually Shows
Twelve current iron shafts, ten of them inside one 46.5-gram window. The word on the label has stopped predicting weight, torque or the ball flight.
- Are Golf Simulators Accurate? What Gets Measured and What Gets Modelled
Garmin files carry distance under 'calculated by algorithm', not 'measured by radar'. An indoor bay watches 2% of the flight. Here is how to audit the rest.
- Wedge Bounce Explained: What the Number Means and Why It Doesn't Travel
Three published bounce charts label the same 7-degree wedge three different ways. What bounce measures, what changes it at impact, and how to test yours.
- How to Measure Putter Length: The Rule and What Fitting Data Says
A putter is measured straight down its own shaft axis; woods and irons come off a 60-degree plane. The at-home method, and what the fitting data says.
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