The Physics of Golf · by Brendon Elliott, PGA Coach

Three-putts come from speed, not line.

Amateurs obsess over the read and burn strokes on pace. Past ~20 feet a small speed error dwarfs a big line error — you three-putt because you left it six feet short, not because you were a degree offline. Three-putts are a speed tax you keep paying.

Start with pace
01 Speed error vs. line error

At distance, pace error buries line error.

Give the same putt a small speed error and a big line error. The engine converts each into feet on the ground and draws where your ball actually finishes — a dispersion cloud around the hole. The long axis is what pace error costs you. The short axis is the line. Watch which one owns the green.

Speed error costs
Line error costs
Past ~20 feet the cloud is a cigar, not a circle. The short/long axis runs several times longer than the left/right axis — you three-putt because you left it six feet short, not because you were a degree offline. Distance is the scoring lever.
Rollout (skid → roll) is the shared engine on Stimp 10; the scatter is an illustrative gaussian dispersion around those computed spreads.
02 The 2-putt zone

On a lag, you're not aiming at the cup. You're aiming at a zone.

Forget the 4.25-inch hole. On a long putt the target is a three-foot circle you can two-putt from every time. Slide the delivery pace and watch where the ball dies — then notice the asymmetry: a touch long stays close, but a ball that dies short is stranded outside the zone and never had a chance to drop.

Finish from hole
Next putt length
Never leave a lag short. A ball still rolling at the hole can drop or finish tap-in close; a ball that dies three feet short is a coin-flip two-putt that never had a chance. Pelz's "17 inches past" is the pace that both makes the most and guarantees the tap-in.
Straight Stimp 10 green; rollout and capture are the shared engine. Rings are the makeable and two-putt-safe radii — illustrative targets, not a rule of golf.
The takeaway

Speed is the lever. Line is the rounding error.

01

Speed is the lever past 20 ft

A 10% pace error swamps a full degree of aim. Bank strokes where they live.

02

You 3-putt from distance, not direction

The card doesn't lie: the long ones you leave short, not offline.

03

Never leave a lag short

Short is stranded. A ball at the hole can drop; a dead one can't.

04

Aim for a zone, not the cup

A three-foot circle you can two-putt from beats a hero line every time.

Now go feel it

Distance control is grooved, not guessed.

Pace is muscle memory, and muscle memory needs a true surface. Your PrimePutt rolls at a real Stimp 10 — build a lag ladder (10, 20, 30, 40 ft), stop each ball inside a towel-width zone, and watch the three-putt tax disappear.

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The PGA translation

What this actually means for your putting.

Coach Brendon Elliott
Coach Brendon's Translation
Plain-English PGA read · Brendon Elliott, PGA
The lesson
When your distance control disappears on a different course, your stroke may not have changed — the surface did.
The mistake most golfers make
Blaming your tempo for a green that's simply faster or slower. You're fighting the Stimp, not your stroke.
One feel to use
Roll every lag to die about 17 inches past the hole. Read the green's speed first, then let your normal stroke send it there.
One drill on your PrimePutt mat
Putt to a tee three feet past the hole and stop the ball short of it — ten in a row. Then move the target and recalibrate by feel, not by hitting harder.
Draft translation seeded from Coach Brendon's notes — for his review and final wording.
The Physics of Golf — a 6-part series

Keep going — you just read Chapter 3.

Honest caveats. The dispersion cloud is an illustrative model — gaussian errors around the hole, not a fit to your stroke. The physics under it — rollout (skid → roll), stopping distance, and the shrinking capture width — is the shared PrimePutt engine on a Stimp 10 green. Directions and orders of magnitude are real; treat exact inches as a model of one green.
Coach Brendon Elliott
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