In June of 2026, the U.S. Open returns to Shinnecock Hills, and the crew setting up those greens will carry a piece of equipment that looks like a child’s bouncy ball. It is not a golf ball. You cannot hit it. It costs the USGA nothing to deploy on a course that already pays for the system behind it, and it does the one thing that the last two Opens at Shinnecock proved nobody on the property could do: it sees inside the green.
Understand why that matters, and you have to go back to the last time Shinnecock humiliated the people running it. 2018. A Saturday afternoon, the back nine coming apart on live television, and a member of the grounds crew walking onto the 15th green during play with a garden hose — syringing the surface by hand, because a hose was the only instrument the USGA had. The 15th produced three birdies that day against 33 scores of bogey or worse. The last 45 players to tee off did not break par, not one of them.
You were told it was the wind. The wind was real, gusting past the 20 miles per hour the USGA’s own setup sheet had projected. But wind is not what beat Shinnecock. What beat Shinnecock was that nobody could see what the wind was doing to the surface until the surface was already gone. The fine fescue and Poa annua those greens are built on carries a thinner canopy than the dense creeping bentgrass under most American greens — less leaf mass holding moisture. When marine wind crosses it, the surface dries faster than a man standing on the fairway can track. The challenge was never knowing that. The challenge was measuring it while it happened in the four hours before a pin position turned lethal. In 2018, the measurement did not exist.
What Davis Had and What He Lacked
Mike Davis had run USGA Open setups since 2005. He walked the course and read the greens by eye, the same way superintendents have always read greens, and the same way the superintendent at your club reads them today. There is nothing wrong with that method as a starting point. It fails the moment conditions move faster than a human can track — and in marine wind on a drying surface, conditions move by the hour. Davis set hole locations near the edges of greens that worked at a green speed of 11 feet and became indefensible as the surfaces dried past it. He could not see the drying. He had a visual read and a hose.
Davis had been the public face of USGA setup since 2005. He was the one who, when Shinnecock was awarded the 2018 Open, promised in front of reporters that 2004 would not happen again. He called that earlier Sunday a double bogey in the USGA’s institutional history — the day the seventh green was watered between groups during the final round, and the scoring average reached 78.7. He gave up the setup role before the next Open. When John Bodenhamer took over, he looked back on Shinnecock at Pebble Beach the following year and put it without a hedge: the USGA simply had not kept enough water on the greens on the back nine that Saturday. The difference between a fair afternoon and a humiliating one was a moisture deficit nobody on the property could see in real time.
DEACON and the GS3 Smart Ball
Look at what the USGA built in the seven years after that hose went out on the 15th. The DEACON management platform launched in 2021. It is a digital system that logs putting surface data, irrigation, pace of play, hole locations, and weather in one record. The GS3 Smart Ball came in 2023 — a rechargeable sensor the exact size and weight of a golf ball that collects over 15,000 data points on a single roll. It measures green speed, firmness, smoothness, and trueness, and it maps every reading to a location through GPS and the DEACON app. Matt Pringle, the managing director of the USGA Green Section, put the point plainly when it launched: for decades the industry judged greens on speed alone. The GS3 judges them on four metrics at once and tells you which part of a green is running differently from the rest.
The way it collects that data is deliberate. A superintendent activates the ball, marks the spot on the DEACON map, and runs six rolls off a Stimpmeter — three in each direction — and the ball averages them. Speed is only one of the four numbers it returns. Smoothness measures the small vertical bounce of the ball as it travels, the up-and-down chatter you feel as a missed putt that should have dropped. Trueness measures side-to-side deviation, the wobble that pushes a rolling ball off its line. Firmness comes from a separate drop, measured in how far the ball penetrates the surface — lower numbers meaning a harder green.
For the first time, a setup crew could put a single objective number on what had only ever been argued about from the green. The USGA’s own GS3 documentation states that firmness varies significantly by location, even within the same green, and that multiple readings should be taken across each surface to get a true picture. One reading off the front of the 15th told Davis nothing about the back shelf where his pin was sitting. The ball that measures it did not exist yet.
The USGA Moisture Meter: What the Hose Was Standing In For
In February of 2025, the USGA released the moisture meter. This is the tool the hose was standing in for. It measures soil moisture, salinity, and temperature, built on a sensing technology from Meter Group called CDX that stays accurate even when salinity and soil temperature would throw an ordinary probe off. It pushes every reading into DEACON, and DEACON paints a color-coded map of the green showing exactly which zones are wet and which are drying out — not which green on the course, but which corner of which green, in real time, with a record you can pull up an hour later and compare.
The probe itself is built for the work. Aluminum, impact-resistant, light enough to carry green to green, charged off a USB port, fitted with tines of an inch and a half or three inches depending on how deep you need to read. The CDX sensing is the part that matters. An ordinary moisture probe gets fooled by salt and by heat in the soil. On a coastal course taking on salt spray off the Atlantic, that error is exactly where you can least afford it. The CDX measurement holds accurate through both, which is why the USGA trusts it to set up a national championship on a links surface.
The reading goes into DEACON the instant it is taken, and it sits next to the firmness number from the GS3 ball. So a setup agronomist is not just seeing how wet a spot is — he is seeing how that moisture is translating into a surface a golf ball has to stop on. Moisture and firmness, the same zone, the same minute. That map is the single thing Mike Davis did not have at noon on Saturday. With it, he sees the back of the 15th running half a point drier than his morning read suggested. He knows the pin he chose will be indefensible by 2:00, and he knows it while there is still time to do something other than send a man out with a hose in front of a television audience.
Augusta’s Answer vs. the USGA’s Answer
Augusta National belongs in this story, because Augusta solved the same problem in a different decade with a different kind of money. Under Augusta’s greens runs a system called SubAir, developed by Marsh Benson in 1994. It is a network of pipes and blowers that pulls moisture down out of the root zone or pushes air up into it on command, green by green. It can dry a saturated green to playable in about two hours. The cost is roughly $30,000 per green, and Augusta has it under all 18. Call it half a million dollars buried in the ground for moisture control alone. That is Augusta’s answer — bury the infrastructure and own it forever.
The USGA built the other answer. Not bury pipes under one club’s 18 greens — a handheld probe and a sensor ball that any course can carry, feeding a map any superintendent can read for a DEACON subscription of $1,250 a year. Augusta spent half a million to see inside its greens. The USGA made the same sight portable. Same biology underneath both. Same question every setup crew is trying to answer. Wildly different scale, and it has already been proven at the level that matters.
The GS3 and the moisture meter are standard equipment at USGA championships now. The 2025 U.S. Open at Oakmont was the first U.S. Open played after the moisture meter existed — the first one where the setup team could pull up a moisture map of a green instead of kneeling down and guessing. Oakmont held. The setup did what it was asked to do.
Shinnecock 2026: The Same Course, Different Instruments
The 2026 U.S. Open returns to Shinnecock Hills in June. The same course that broke the USGA in 2004 when the seventh green was watered between groups on Sunday and the scoring average hit 78.7. The same course that broke them again in 2018 with a hose on the 15th. The fine fescue and Poa annua have not changed. The wind off the Atlantic has not changed. The thin canopy will still dry faster than anyone standing on the fairway can see. What has changed is that the setup crew walking those greens in 2026 will carry the instruments that did not exist the last two times Shinnecock made them look like they lost control of a golf course.
So watch the greens this June. When the surfaces hold through a windy Saturday afternoon and the leaderboard stays honest, it will not be because the wind died or the grass changed. It will be because a setup crew could finally read the moisture in a specific corner of a specific green an hour before it became a problem, instead of sending a man out with a hose once it already was. Your own course will never own the ball or the probe. But the next time your greens get away from someone on a dry afternoon, you will know it was not a mystery. It was a measurement nobody took in time.
Now you know what they do before you tee off.