Scottie Scheffler Grand Slam Odds: What Kalshi's 7-Cent Contract Really Prices

Scottie Scheffler grand slam odds are live on Kalshi, and the contract last traded at 7 cents, roughly a 7% implied chance that the world No. 1 wins the Masters, the PGA Championship, the U.S. Open, and the Open Championship in a single calendar year before 2028. Here is the thesis of this page: that price is not really about golf skill. The number is about how markets treat famous longshots, and a projections reader can expose it with one piece of math, the fourth root, that we will run below. Run it honestly and you will also see why one April weekend at Augusta National decides nearly everything this contract is worth.

Prices in this article were fetched from the live Kalshi exchange on August 11, 2026. They move; treat every number as a snapshot rather than a quote.

The Quick Answer

Kalshi's KXSCOTTIESLAM-28 contract pays out only if Scheffler sweeps all four men's golf majors in one calendar year before January 1, 2028, and since he went 0-for-4 in the 2026 majors, the market is now a pure play on a 2027 sweep. At 5 cents bid and 7 cents asked, the price implies roughly a 5% to 7% chance, which requires a per-major win rate near 50%. The full decomposition, his actual major record, and why the price stays high anyway are below.

Kalshi is a CFTC-regulated event-contract exchange, open to users 18 and up where available; as of August 2026, access varies by state, so check the platform's own eligibility screen. Prices are implied probabilities rather than promises, and nothing here is financial advice.

What This Contract Pays, And What It Does Not

Read the settlement rule before the price, because the rule is doing most of the work. The contract resolves Yes only if Scheffler wins the Masters, the PGA Championship, the U.S. Open, and the Open Championship "in a single year" before January 1, 2028. The rule describes the calendar-year slam, which no male golfer has accomplished in the four-major era.

What the contract does not pay is the career grand slam, the version most people searching this phrase have in mind. Scheffler owns four career majors: the 2022 and 2024 Masters, the 2025 PGA Championship, and the 2025 Open Championship. The only trophy missing from his career set is the U.S. Open, and his next crack at it comes at Pebble Beach in June 2027. This contract pays nothing for completing the career slam. It pays for a sweep.

That distinction got expensive this year. The 2026 majors are settled: Rory McIlroy won the Masters with Scheffler one shot back in second, Aaron Rai took the PGA Championship, Wyndham Clark won the U.S. Open, and Ryan Fox birdied the 72nd hole at Royal Birkdale to win the Open. Scheffler contended all year and won none of them, so every cent of today's price rides on one season: 2027.

The Live Board

The row worth narrating is the volume pair. Nearly 600,000 contracts have traded over the market's life, yet only about 268 changed hands in the 24 hours before our fetch, and the spread is two full cents on a 6-cent midpoint. In DFS terms that spread is a rake: buy the ask and you pay 7% for a position the next seller values at 5%. Thin daily tape on a far-dated contract is where prices drift from fair value, the same dynamic we flagged on our Wyndham Championship odds board when stale quotes outlived the live tournament.

The Worked Example: Fourth-Root The Price

A one-year slam is four wins in one season, so treat it like a four-leg entry and ask what each leg must be worth. Assume the four majors are independent with an equal win probability, and the per-major rate implied by the price is the fourth root:

Sit with the right-hand column. The asking price treats Scheffler as a coin flip or better in every single 2027 major: Augusta, the PGA, Pebble Beach, and a links Open.

His actual record is the reality check. Across 2024 and 2025, the hottest stretch of his career, Scheffler won 3 of 8 majors, a 37.5% strike rate. Compound that best-case rate across four legs and you get about 2%. Use his last 12 majors instead, 3 wins plus the 0-for-4 in 2026, and the rate falls to 25%, which compounds to roughly 0.4%, a 1-in-256 season. History votes with the smaller numbers: in the four-major era, only Ben Hogan in 1953 and Tiger Woods in 2000 won even three professional majors in a calendar year, and Woods' famous "Tiger Slam" held all four titles at once without landing them in one season.

Why Correlation Only Closes Part Of The Gap

The honest counter-argument is that fourth-root math undersells him, and it does, a little. Major wins are not independent coin flips; they behave like a same-golfer stack. The version of Scheffler who wins the 2027 Masters is disproportionately the version having a peak ball-striking year, which raises his conditional chances at the next three stops.

But correlation multiplies the base rate; it does not replace it. Double the peak-form 2% figure to be generous and you land near 4%, still under the 5-cent bid. To make the ask fair you need his best-ever strike rate as the floor, plus meaningful correlation on top. The market is not pricing a scenario. It is pricing a story.

Why The Price Holds Anyway

If the math says a percent or two and the screen says 5 to 7, something is paying the difference, and ownership dynamics explain it better than golf does. A 7-cent ticket on the most famous golfer alive making history is a lottery ticket with a name on it, the event-contract version of mass-appeal chalk: demand shows up because the story is fun, not because the number is right.

The other side of the trade explains the rest. Anyone who thinks fair value is 1% cannot simply collect the gap: selling Yes means posting roughly 93 to 95 cents of collateral per contract until resolution, potentially January 2028, to earn a nickel. Seventeen months of lockup for a single-digit return on a thin book. When correcting a price costs more than the mispricing pays, the mispricing survives. We track this class of model-versus-market gap on our running Sims-versus-Kalshi ledger, and it is why pick'em players comparing platforms learn to read a board's tails skeptically.

Methodology: Price To Probability, Minus Fees

A Kalshi contract settles at $1.00 if the event happens and $0.00 if it does not, so a price in cents reads directly as an implied probability: 7 cents means 7%. Two frictions shift the effective odds. Trading fees scale with price and peak near 50 cents, so they are small out here at the tail, and the bid-ask spread is the larger cost, working like a two-cent hold between buyer and seller. This page is built on live exchange prices and public results only; our standing AI model panel has not weighed in on this board yet, and that verdict layer gets added when the page next refreshes.

From Slam Math To This Week's DFS Board

The same decomposition that breaks a slam price into per-major win rates is how to read Scheffler in every tournament market and DFS slate between now and April: one event, one win probability, priced against the field. This week's board makes the gap concrete. On Kalshi's FedEx St. Jude Championship winner market, fetched the same August 11 as everything above, Scheffler asks 16 cents against a 15-cent bid, the highest price in the 69-man field, and even that dominant one-week number is barely a third of the near-50% per-major rate the slam ask demands. The number I keep coming back to is that 37.5%, because it cuts both ways: it makes a calendar slam a longshot at any price, and it makes Scheffler the most bankable single-week asset in golf. Our GOLF DFS projections, ownership, and stacks in the DataHub rebuild that per-event read every slate, and you can try the Sims free to see how a weekly win number translates into lineups and leverage. For the wider board context, our sports prediction markets hub tracks every market class we cover, including single-event golf boards like the Rocket Classic model verdict.

The Bottom Line

Zoom back out to the thesis. This contract is a story trade at 5 to 7 cents, and the fourth root shows what the story costs: a near-50% win rate in all four 2027 majors, roughly 12 points above the best sustained rate of Scheffler's career at the 6-cent midpoint. Now the payoff of that setup: at the same career-best 37.5% rate, the fair price of the slam after he wins the 2027 Masters is about 5%, which means today's board is already charging roughly the post-Augusta price, at the bid, eight months before Augusta. That is the whole market in one sentence. If he loses the 2027 Masters, this contract goes to zero on a Sunday in April; if he wins it, you paid last summer's price for this spring's news. Traders who think in projections rather than narratives will recognize the pattern, because DFS teaches it every slate: the famous name is rarely the mispriced one.

FAQ: Scottie Scheffler Grand Slam Odds

Has any golfer ever won the calendar-year grand slam? No male golfer has won all four professional majors in a single calendar year. Bobby Jones swept 1930's four biggest events before the Masters existed, and Tiger Woods held all four trophies at once across 2000-01, but nobody has landed the modern slam in one season.

What does Scheffler still need for the career grand slam? Only the U.S. Open. He has won the Masters (2022, 2024), the PGA Championship (2025), and the Open Championship (2025), and his next U.S. Open start is at Pebble Beach in June 2027. The Kalshi contract on this page does not pay for the career slam, only a single-year sweep.

Why is this market only about 2027? The contract requires the sweep in a single year before January 1, 2028. The 2026 majors are complete and Scheffler won none of them, so 2027 is the last season that can settle the contract Yes.

What do the current Scheffler grand slam odds mean in probability terms? As of August 11, 2026, the market shows a 5-cent bid and a 7-cent ask, an implied 5% to 7% chance of a 2027 sweep. Under simple independence math, that requires winning each major at roughly a 47% to 51% clip.