The first trade on Kalshi's Amgen Irish Open winner board was 56 cents on Thriston Lawrence. It printed at 12:12 p.m. ET on Sunday, September 6, the day the South African shot a final-round 62 and won the Omega European Masters on the fourth playoff hole, and by Tuesday night the bid on his contract for Doonbeg was nine-tenths of a cent. Rory McIlroy's first print came 48 minutes later at 24 cents. The defending champion, the reigning Masters champion, the man with two Irish Open trophies and the biggest crowd in the field, closed Monday night at 13 and spent all of Tuesday between 12 and 14. Between those two numbers the market took roughly half of his chance away without anyone hitting a competitive shot. It did it on a tape where 99 of every 100 contracts were bought by the person who crossed the spread, not sold, meaning the aggressor took the Yes side of the contract rather than the No. Through 11:12 p.m. ET on Tuesday the count was 2,111,988 buys against 25,994 sales.
That last number is the whole character of this board, and the rest of this page is built on it. A market that only ever buys can still be right, but its prices are set by which names the buyers reach for next and how much a seller is willing to charge them, not by anyone arguing the other side. So the questions this week settles are the ones a buyers' board leaves open. Was 13 cents a correction or an overreaction on McIlroy? Why did the same buyers take Jon Rahm from 22 cents to 8 while one sportsbook list left him at 8.5-to-1? And what is a golfer who won on Sunday in Switzerland worth on Thursday in County Clare? We put the same 144-name board in front of a panel of AI models that never saw a price, and their numbers, and the one name where they and the market disagree most, are below the board.
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These are market prices and model estimates, not predictions of fact and not financial advice. Kalshi is a CFTC-regulated event-contract exchange (18+; availability varies by state). Every number the panel produces here gets graded in public once the market settles, on the full graded scoreboard.
Prices as of 11:12 p.m. ET on Tuesday, September 8, 2026, less than two days before the first round. The blended panel number, the seat median, sits beside every price on the board below.
How Buyers Built The Board In Three Days
Kalshi listed the board at 12:05 p.m. ET on Saturday, September 5, as one yes/no contract per golfer, each paying $1 if that man wins the 2026 Amgen Irish Open at Trump International Golf Links in Doonbeg, Thursday through Sunday, September 10 to 13. The bid is what a buyer is offering, the ask is what a seller wants, and cent prices read roughly as implied win percentages, a translation covered in our guide to Kalshi odds. Nothing traded on Saturday. Sunday brought 42,308 contracts and a set of opening prices no one has seen since: Lawrence at 56, McIlroy at 24, Rahm at 22, Tyrrell Hatton and Robert MacIntyre at 12 and 13, Shane Lowry at 11, Brooks Koepka at 11, Tom McKibbin at 10.
Monday is when the board became a market. It traded 662,950 contracts, and Tuesday traded 1,432,724 more by 11:12 p.m. ET, more than Sunday and Monday combined. Across the three days the buyers took the whole top of the board down, which sounds backwards until you remember that a buyer only sets a price when he lifts an ask, and every ask on Sunday was set by a thin book charging a fortune to anyone in a hurry. As sellers showed up with size, the asks fell to meet the buying rather than the other way around. McIlroy traded as low as 10 cents on Monday morning before settling at 13, where three prints took 4,485 contracts at 5:34 p.m. ET, 3,625 more at 6:29 and 2,538 at 6:46. Rahm was 17 cents on Sunday night and 14 at midnight; on Monday he traded down to 8 and closed at 8.6, and at 10:11 p.m. ET two prints in the same second paid 8.8 and 8.9 cents for 7,467 contracts. Hatton, who printed at 12 cents on Sunday, was 7.6 at his Monday high and 4.2 at the close, and at 1:33 a.m. ET on Tuesday the buyers took 9,500 contracts at 4.4 and 4.5 cents.
Tuesday was the same tape at twice the size. McIlroy turned over 68,462 contracts between 12 and 14 cents, with 6,865 bought at 13 at 12:56 p.m. ET and 6,527 more at 13 at 4:37 p.m. His only print at 14 came at 6:05 p.m. In the same minute one trade of 1,738 contracts paid 9.3 cents for Hatton, double his morning price. By the close McIlroy was back at 13 and Hatton's ask was 4.5. Hatton traded 56,543 contracts on Tuesday, more than any name on the board except Patrick Reed and McIlroy, and the buyers who paid 5.5 cents for 6,149 of them at 11:23 a.m. and 5.4 for 6,009 at 4:37 p.m. were the ones who moved him. Lowry's day was one burst at 4:36 p.m., when the buyers took 7,500 contracts at 3.5 cents and pushed him to a 4.2-cent high on the way to 51,613 contracts for the day. His ask closed at 3, which is where the panel below the board picks him up, because it is the one price near the top the models would pay more for.
The sellers who met all of that had one thing in common: they were almost never the person crossing the spread. Only 25,994 contracts on the whole board have been sold into a bid, and 9,729 of the 1,432,724 that traded on Tuesday. Reed's market accounts for 8,980 of the lifetime total, every one of them on Monday, including the single largest sale on the tape, 6,146 contracts at 2.9 cents at 1:51 p.m. ET. McIlroy's market has absorbed 4,011 sales and Rahm's 2,615. Everyone else who wanted out of a position simply left an offer and waited for the next buyer, and on this board the next buyer always came.
The tell on this tape: of the 56 prints of 5,000 contracts or more on the board, 55 were buyers lifting an ask, and the one exception was the Reed sale. The largest print of all was 14,293 contracts on David Micheluzzi at a tenth of a cent at 12:26 p.m. ET on Tuesday, about $14 of premium. The asks came down anyway, because the sellers were the ones setting them and they kept setting them lower.
Add the asks on all 144 contracts and you get 123.7 cents for a dollar of outcome; add the bids and you get 97.8. The 10 most expensive asks alone come to 48.6 cents. The gap between the two columns is where the truth sits, and on the cheap end of the board it is most of the price: 125 golfers have a bid above zero, only 28 have a bid of at least a penny, and five contracts have never traded at all, down from 39 on Tuesday morning. The board also grew while it traded. Joaquin Niemann's contract did not exist until 12:10 p.m. ET on Monday, when Kalshi added him and 13 others in one batch, and by Tuesday night it had turned over 26,611 contracts and sat fifth on the board. If you own the June version of any of these names in your head, it is out of date; if you own the Sunday version, it is out of date by half.
What A Home Champion Costs On A Buyers' Board
The 13 cents on McIlroy buys the best résumé in the field and the strangest form line. He won this event at The K Club last September on the third playoff hole after holing a 28-foot eagle putt on the 72nd green to catch Joakim Lagergren, a year after finishing one shot behind Rasmus Højgaard at Royal County Down, and nine years after winning it the first time at the same K Club. In April he became the first man since Tiger Woods to win the Masters in consecutive years. Since then, per ESPN's results log, he has tied 19th at the Truist Championship, tied seventh at the PGA Championship, tied 12th at the Memorial, tied 32nd at the U.S. Open, tied seventh at the Scottish Open, tied 40th at The Open, 66th at the FedEx St. Jude Championship, third at the BMW Championship and tied fourth at the Tour Championship on August 30. That is a top-five in each of his last two starts, on the American tour, against fields deeper than this one. He arrives in Clare as the world No. 2, and when he committed to the event in March, in a DP World Tour article carried by Yahoo Sports, he said why: "The roar when I holed my eagle putt on the 18th and the energy from the crowd will stay with me forever. Hopefully I can give the fans more of the same this year at Doonbeg."
The sportsbooks charge more for that than the exchange does. Golf News Net's published odds list for the week, dated Monday, has McIlroy at +600. That implies 14.3% before the book's margin is stripped out, against a 13-cent ask on Kalshi. Rahm is where the two markets stop agreeing. The book has him at +850, a 10.5% implied chance, against an 8-cent ask. The table is the top of that Monday list against the exchange's Tuesday-night asks, with the book's implied percentages carrying its margin, so they run high as a group.
| Golfer | Kalshi Ask (Tuesday night) | Book Odds (Monday) | Book Implied |
|---|---|---|---|
| Rory McIlroy | 13¢ | +600 | 14.3% |
| Jon Rahm | 8¢ | +850 | 10.5% |
| Robert MacIntyre | 4.3¢ | +1600 | 5.9% |
| Joaquin Niemann | 4.3¢ | +1600 | 5.9% |
| Tyrrell Hatton | 4.5¢ | +2200 | 4.3% |
| Matt Wallace | 3.2¢ | +3000 | 3.2% |
| Alex Fitzpatrick | 2.9¢ | +3300 | 2.9% |
| Shane Lowry | 3¢ | +3000 | 3.2% |
| Patrick Reed | 2.8¢ | +3300 | 2.9% |
| Rasmus Højgaard | 2.6¢ | +3300 | 2.9% |
| Harry Hall | 2.4¢ | +3000 | 3.2% |
| Brooks Koepka | 1.9¢ | +3500 | 2.8% |
| Jacob Skov Olesen | 1.7¢ | +6000 | 1.6% |
| Thriston Lawrence | 1¢ | +8000 | 1.2% |
Two rows run the wrong way. On 10 of the 14 names the book's implied number sits above the exchange's ask, which is what a book's margin does, and on Wallace and Fitzpatrick the two are level to the tenth. On Hatton the exchange asks 4.5 cents for a golfer the book prices at 4.3%, the only name at the top of the board where it does, and that gap did not exist on Tuesday morning; it is what 56,543 contracts of buying in one day looks like. On Olesen it asks 1.7 for a man the book has at 1.6%. Olesen is a DP World Tour regular who tied second at the British Masters two weeks ago. Alex Fitzpatrick, who plays the American tour and tied fourth at the Tour Championship alongside McIlroy, opened at 7.8 cents on Sunday, was 2 cents by Monday morning, and has settled between 2.7 and 3.2 since. The Niemann row is the one with no history at all. His contract did not exist until Monday lunchtime, it took 26,611 contracts in its first 35 hours, and the buyers priced a man who won LIV Golf New York in August and finished third at the Italian Open in June at 4.3 cents, level with MacIntyre at the book and on the exchange. The panel, which is below the board, has him 1.2 points under that price, its largest fade on any name that was not listed when the week began.
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Rahm, Hatton And What The LIV Names Are Worth Here
The 8 cents on Rahm is the price the market moved most in his direction and then abandoned. Rahm has won this tournament twice, at Portstewart in 2017 and at Lahinch in 2019, the last time it came to County Clare, and both were links wins by a man whose ball flight was built for wind. His 2026 record in the card the panel worked from is two wins, nine top-fives and 10 top-10s in 17 starts across LIV and the majors, most recently a runner-up at LIV Golf Indianapolis on August 20. The buyers who paid 17 cents for him on Sunday night were paying for that; the ones who paid 8.8 on Monday night got the same golfer at half the price, and neither group was selling. On Tuesday he drifted from 8.8 to a low of 7.7 and closed with a 7.7 bid and an 8-cent ask, on 52,418 lifetime contracts. The two-time champion of the event, on the ground it rewards, costs less than two-thirds of the defending champion.
Hatton is the name the buyers chased on Tuesday. He won LIV Golf Andalucía in June and finished second at LIV Golf United Kingdom in July, then tied 46th at the British Masters two weeks ago on his return to the DP World Tour, and he tied for third at the Masters in April behind McIlroy. At 4.5 cents the exchange now prices him above the book's 4.3%, and the tape says his buyers had to work for every step of it: a print at a tenth of a cent on Monday morning marks the moment his order book briefly had no one on the other side at all, and the 9.3-cent print on Tuesday evening marks the moment a buyer ran out of asks below it. Koepka is the LIV name the market has given up on. He missed the cut on his Irish Open debut last year, has one top-10 in 15 starts this season per the card, and asks 1.9 cents against a book price of +3500, even after a buyer took 7,398 contracts at that price at 8:28 p.m. ET on Tuesday.
The one I keep coming back to is Reed, because he is the only golfer on the board whose contract anyone sold with conviction, and then the buyers answered. Reed leads the Race to Dubai, the DP World Tour's season-long standings, with 2,860.92 points to McIlroy's 2,552.86 at the tour's early-August update, after winning the Hero Dubai Desert Classic and the Qatar Masters in the winter. He has since finished tied 30th, tied 55th and tied 11th in three DP World Tour starts, the last of them at Crans-Montana on Sunday. His contract opened at 10 cents on Sunday afternoon and took the board's biggest sale on Monday. Then on Tuesday it traded 81,146 contracts, every one of them bought, including 9,863 at 2.8 cents at 10:41 p.m. ET and 8,360 more at the same price a minute later, and it now stands at 114,943 lifetime, second only to McIlroy's. The price barely moved: a 2.2-cent bid under a 2.8-cent ask, a spread neither side has closed. Monday's sellers decided that a season-long points lead built in the desert says nothing about four days on the Atlantic; Tuesday's buyers paid to disagree, and neither side has given the other an inch.
The Board: Every Golfer With A Bid Of A Penny Or More
The table is Kalshi's Amgen Irish Open winner market, ticker KXDPWORLDTOUR-AMIO26, as of 11:12 p.m. ET on Tuesday, September 8, 2026, for the 28 golfers whose bid was at least one cent. Contracts traded is lifetime volume in that golfer's market. The panel column is the middle answer from seven AI models that priced the whole 144-name board from the same fetched card of world rankings, 2026 results and Irish Open history, with every market price stripped out; each model priced a 57-name shortlist plus one combined number for the other 87, and its board had to add to 100. The difference is the panel's median minus the midpoint of the bid and ask, in percentage points. Tom McKibbin and Antoine Rozner were outside the shortlist, so their shares sit inside the panel's combined number for the rest of the field, which came to about 20%.
| Golfer | Buyers Bid / Sellers Ask | Contracts Traded | Panel Median | Difference |
|---|---|---|---|---|
| Rory McIlroy | 12¢ / 13¢ | 117,661 | 13.5% | +1.0 |
| Jon Rahm | 7.7¢ / 8¢ | 52,418 | 8.8% | +0.9 |
| Tyrrell Hatton | 4.2¢ / 4.5¢ | 72,883 | 3.8% | -0.5 |
| Robert MacIntyre | 4.2¢ / 4.3¢ | 34,114 | 4.5% | +0.2 |
| Joaquin Niemann | 4¢ / 4.3¢ | 26,611 | 3.0% | -1.2 |
| Matt Wallace | 3.1¢ / 3.2¢ | 10,979 | 2.0% | -1.2 |
| Shane Lowry | 2.8¢ / 3¢ | 66,675 | 3.5% | +0.6 |
| Alex Fitzpatrick | 2.7¢ / 2.9¢ | 36,129 | 1.6% | -1.2 |
| Rasmus Højgaard | 2.5¢ / 2.6¢ | 23,816 | 2.3% | -0.2 |
| Harry Hall | 2.3¢ / 2.4¢ | 11,477 | 1.4% | -0.9 |
| Patrick Reed | 2.2¢ / 2.8¢ | 114,943 | 2.5% | 0.0 |
| Eugenio Lopez-Chacarra | 2.2¢ / 2.5¢ | 55,828 | 1.8% | -0.5 |
| Nicolai Højgaard | 2¢ / 2.4¢ | 39,259 | 1.6% | -0.6 |
| Oliver Lindell | 2¢ / 2.1¢ | 44,480 | 1.2% | -0.8 |
| Tom McKibbin | 1.8¢ / 2¢ | 25,581 | in the field bucket | n/a |
| Jordan L. Smith | 1.8¢ / 1.9¢ | 9,703 | 0.8% | -1.0 |
| Angel Ayora Fanegas | 1.7¢ / 2¢ | 51,085 | 0.9% | -1.0 |
| Brooks Koepka | 1.6¢ / 1.9¢ | 40,421 | 0.5% | -1.3 |
| Jacob Skov Olesen | 1.6¢ / 1.7¢ | 64,498 | 1.2% | -0.5 |
| Matthew Jordan | 1.5¢ / 1.6¢ | 28,271 | 1.1% | -0.4 |
| Casey Jarvis | 1.4¢ / 1.9¢ | 26,209 | 1.2% | -0.4 |
| Daniel Hillier | 1.3¢ / 1.6¢ | 19,468 | 0.9% | -0.5 |
| Antoine Rozner | 1.3¢ / 1.4¢ | 36,815 | in the field bucket | n/a |
| Thomas Detry | 1.1¢ / 1.5¢ | 4,784 | 1.5% | +0.2 |
| Sepp Straka | 1.1¢ / 1.4¢ | 17,479 | 1.5% | +0.2 |
| Sergio Garcia | 1¢ / 1.3¢ | 12,268 | 1.4% | +0.2 |
| Bernd Wiesberger | 1¢ / 1.1¢ | 62,940 | 0.8% | -0.3 |
| David Puig | 1¢ / 1.1¢ | 13,118 | 1.3% | +0.2 |
These are model estimates, not predictions of fact and not financial advice. Market prices were fetched from the Kalshi API at 11:12 p.m. ET on Tuesday, September 8, 2026. The panel column is the seat median after a revision round in which each model read the others' anonymized reasoning and could change its number; seven of the nine seats we asked returned a usable board, and the numbers were generated on Tuesday morning.
Every seat on this panel is graded against real market settlements — records to date: Claude Fable 90% on 2,542 graded calls · Claude Opus 89% on 2,681 graded calls · Claude Sonnet 88% on 2,658 graded calls · Gemini 87% on 8,145 graded calls · GLM 84% on 3,747 graded calls · Kimi 87% on 4,074 graded calls · Grok 85% on 6,673 graded calls. Recomputed daily; the full scoreboard is public.
More live boards from the same panel: NASCAR Cup champion odds (Denny Hamlin 38¢ to buy after the Southern 500) · Heisman Trophy odds (Darian Mensah 17¢ to buy) · F1 2026 champion odds (Kimi Antonelli 87¢ to buy). Prices fetched the night of September 8, 2026.
The row to read first is Shane Lowry's, because it is the third row where the panel is buying and the market is not, and the only one outside the two favorites. All seven models put the 2019 Open champion between 3.5% and 4%, against a 2.8-cent bid and a 3-cent ask. The four seats that explained the number stopped at the same brake, no win in 2026, and one of them counted his missed cuts as the reason to go no higher; another called its 3.6% "a deliberate home-crowd tax on three straight Irish Open top-15s," pricing the crowd as a cost rather than a gift. It has the shape of a considered number rather than a sentimental one, and Tuesday's tape visited it: the 4:36 p.m. burst carried Lowry to 4.2 cents before the ask settled back at 3. The McIlroy row is the other one to read: the seven models landed between 13% and 16.5%, with a median of 13.5%, a point above the market's midpoint and ten and a half points below where the buyers started him on Sunday.
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Where The Panel And The Market Split
The panel's loudest disagreement with the buyers is Brooks Koepka. The market asks 1.9 cents for the five-time major champion, the books have him at +3500, and the seven models put him between 0.3% and 0.7%, a median of 0.5%. All seven named him unprompted as the golfer the public would most misprice, and the reason in every case was the same card fact: no top-five finish in 15 starts this season and a missed cut in this event a year ago.
His major pedigree draws casual backing, but zero top-five finishes across his last 15 starts and a missed cut at the Irish Open last year justify a steep fade to just 0.4%. — Gemini
The second split runs the other way on the same kind of golfer. The market's buyers hold Alex Fitzpatrick at 2.9 cents, Matt Wallace at 3.2 and Joaquin Niemann at 4.3; the panel has them at 1.6%, 2.0% and 3.0%, the three names other than Koepka where the buyers' price runs more than a point above the models. Hatton, at 4.5 cents against a 3.8% median, moved toward that group on Tuesday, to a half-point gap. All four are the same argument from the model side: recent finishes on the American tour and the LIV circuit bought them a Kalshi price that a wind-exposed par 70 in County Clare does not obviously justify. The panel and the market agree almost exactly on MacIntyre at 4.5%, Reed at 2.5% and Rasmus Højgaard at 2.3%. On Lawrence, whom every seat put between 1.1% and 1.4% by the same route, the buyers have now gone under the panel: his bid closed Tuesday at 0.9 cents.
Lawrence stays at 1.3% because an Omega playoff win at altitude after 11 missed cuts is a tail event, not a level, and back-to-back Sundays on opposite setups almost never happen. — Fable
The revision round moved the panel in one direction: toward the rest of the field. Before reading each other, the seven models gave the 87 golfers outside the shortlist anywhere from 11.6% to 36.9% combined; after reading each other, they sat between 18.5% and 22.1%, a median of about 20%. The model that came up furthest, from 11.6% to 19%, said why: the credential filter had left out Tom McKibbin, with three straight top-12 finishes on the DP World Tour, along with Laurie Canter, Victor Perez, Thomas Rosenmueller and Thorbjørn Olesen, and this season's tour had already crowned three winners ranked outside the world's top 250. The model that had started at 36.9% came down to 22.1%. A third barely moved at all, from 23% to 22%, and said the 37% number had been "too punitive given both Rory and Rahm teeing it up." A fourth moved up from 14.2% to 18.5% and drew the line there:
I will not follow Forecaster G to a 37% FIELD. That bucket is the weaker two-thirds by credential; McKibbin, Canter, Perez, Olesen and Rosenmueller are live, but 87 mostly-OWGR-200-plus names justify 18.5%, not a third of the market. — Opus
The market's own number for those 87 golfers, adding up the midpoints of their bids and asks, is 25.1 cents, which is 22.7% once the board's 110.8-cent midpoint total is scaled down to 100. So on the field the buyers are still ahead of the panel by about three points, and on McIlroy and Rahm the panel is a point ahead of the buyers. It is a narrower disagreement than Sunday's prices would have produced, and it is the callback this page keeps returning to: the buyers who paid 24 cents for McIlroy and 22 for Rahm were ten and a half and 13 points above where seven price-blind models landed two days later, and the sellers who took those prices down did the panel's work before the panel did it. What would move the panel from here is event-shaped. Five of the seven models named the Thursday-Friday wind draw as the one thing that would change their boards, in the direction of the field if one half of the draw gets Thursday's rain and the other gets Friday's calm. The other two named the confirmed 138-man entry list, and one of them said why in a sentence the cheap end of this board should read twice: "Entry-list contracts on men who never tee off are dead money, and several LIV names here are unconfirmed."
The Cheap End: Where A Million Contracts Went
Contracts are not dollars, and the cheap end of this board is where that matters most. A 2-cent contract costs a fiftieth of a $1 one, so a buyer with a fixed budget shows up at the bottom of the board with 50 times the volume, and the lifetime column rewards conviction bought in bulk. Of the 1,208,282 contracts that traded after 8 a.m. ET on Tuesday, the biggest single prints were on Micheluzzi at a tenth of a cent, Victor Perez at half a cent, 11,550 contracts at 9:39 a.m., and Rozner at 1.7 cents, 10,057 contracts at 10:49 a.m. followed by 7,500 more at 1.8 half an hour later. Olesen's market has traded 64,498 contracts, more than any name on the board except McIlroy, Reed, Hatton and Lowry, at prices between 1.1 and 2.5 cents. Bernd Wiesberger's has traded 62,940, and on Tuesday it printed at 6 cents at 12:01 p.m. ET, 229 contracts, then 5,924 contracts at 1.9 in the same minute, and was back at 1.1 by 1:17 p.m. Lawrence's has traded 58,010, most of them after Sunday's 56-cent opener, including a 10,000-contract print at 2 cents at 6:47 p.m. ET on Monday and 5,144 at 1 cent on Tuesday afternoon. Angel Ayora's has traded 51,085.
Some of those names are worth more than their price suggests and some are worth exactly what it says, and the tournament's own history is the reason the buyers keep trying. Seven of the last 11 Irish Opens went to someone other than McIlroy or Rahm, a list that runs Søren Kjeldsen, Russell Knox, John Catlin, Lucas Herbert, Adrian Meronk, Vincent Norrman and Rasmus Højgaard, and the venue moves around the island, and no Irish Open has been played at Doonbeg, so nobody has course form. The layout this week, per the DP World Tour setup published by Golf Betting System, is a par 70 of 6,838 yards, with the members' par-5 first and 13th holes playing as par 4s of 498 and 492 yards, five par 3s, ten par 4s and three par 5s, on a Greg Norman links from 2002 that Martin Hawtree redesigned after the Trump Organization bought the resort in 2014. Short, exposed and unfamiliar to everyone is the shape of course that lets a 2-cent golfer hang around until Sunday.
Olesen, at 1.7 cents, is the cheap-end case with the most behind it. He was tied second at the British Masters two weeks ago, eighth at last year's Irish Open, and has five top-fives this season without a win; the book has him at +6000. Wiesberger, at 1.1 cents, has two runner-up finishes in this event and tied fourth at Crans on Sunday. Ayora, at 2 cents, tied fifth at The K Club last year and tied fourth on Sunday. Lawrence's case is the one the buyers priced first and worst: 11 missed cuts in 20 starts this season, and then a 62 to win a playoff. A man who has just done that is either the hottest player in the field or the most spent, and a bid under a penny is the market saying it has decided which.
The rest of the cheap end carries a warning the board does not print. The Irish Times reported on Monday that this week's field is 138 players rather than the usual 156, a number Golf News Net's Monday preview still carried, and ESPN's entry list, published Tuesday night, carries exactly 138 names. Kalshi lists 144, and its rules settle any listed golfer who does not tee off at No. Set the two lists side by side and six Kalshi contracts are on men ESPN does not have in the field as of Tuesday night: Victor Perez, Daniel Brown, Ockie Strydom, Louis De Jager, Thomas Rosenmueller and Marcel Siem. Perez's market has traded 21,907 contracts, 11,550 of them in one print at half a cent at 9:39 a.m. ET on Tuesday, and Perez and Rosenmueller were two of the names the models themselves cited as live inside the field bucket. At a fraction of a cent the difference between a long shot and a dead one is invisible on the price. The buyers at half a cent are betting on a golfer; the sellers are collecting from anyone who did not check the entry list.
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What Thursday Starts To Settle
The forecast is the setup. Tuesday night's Open-Meteo model run for Doonbeg puts Thursday's peak wind at 14 mph with gusts to 26 and a 92% chance of rain, Friday calmer at 12 mph and mostly dry, then Saturday at 24 mph with gusts to 39 and nine millimeters of rain, before Sunday eases back to 15. Monday's arrivals got the preview: the Irish Times had Rahm among the early arrivals forced off the short-game area when "the heavens opened." A Saturday like that on a course built for wind is the day the cheap end either gets blown out or blown into contention, and it is the day the 13 cents on McIlroy has to survive.
The crowd will be the other force. Weekend tickets are sold out, and Yahoo Sports reports that President Donald Trump, whose company owns the resort, is expected to attend on Saturday as part of a two-day visit to Ireland and may present the trophy on Sunday evening. U.S. viewers get Thursday's round on Golf Channel from 8:30 a.m. ET, with weekend coverage on CNBC from 9:30 a.m. Saturday and 8:30 a.m. Sunday, per Yahoo's broadcast guide. The winner takes 5,000 Race to Dubai points, which makes Reed's contract and McIlroy's the same bet in a second market: 5,000 is more than the 308-point lead Reed held at the tour's early-August update, so a McIlroy win here would put the season-long race back in play before next week's BMW PGA Championship at Wentworth.
Three days of buying have already set up the argument Sunday settles. The buyers who paid 24 cents for McIlroy at Sunday lunch and the buyers who paid 13 on Monday night and all day Tuesday own the same contract, and only one group got the price right. A McIlroy win says the Monday sellers were charging too little for a man who has finished third and fourth in his last two starts; a win by anyone else says 24 was never the number, and 13 was still generous for a golfer who has not won since Augusta. Rahm at 8 cents is the cheaper way to bet that the market cut the wrong champion, and Olesen at 1.7 is the cheapest way to bet that this tournament does what it usually does. The first thing to watch on Thursday is which side of the draw gets the calm half of the day, because the price will move on the tee sheet before it moves on a score.
Because Kalshi is an exchange rather than a sportsbook, none of these positions has to be held to Sunday: a golfer who leads after 36 holes can be sold on Friday night, and Kalshi's trading fee comes off at whatever price you trade. Our guide to betting golf on Kalshi covers how a 144-name board behaves once the cut falls. For expert angles on the sports OddsShopper covers every day, start with the free expert picks hub.
