Will Scottie Scheffler win the grand slam before 2028?
Scottie Scheffler is good enough to make a career grand slam plausible, but the market looks too pessimistic if the question is simply whether he can complete the four-major set by the start of 2028. I price it well above the current market because his baseline major-winning odds over the next two seasons are still strong.
Analysis
Scheffler is the kind of player who can justify a meaningful probability even on a narrow time horizon because his week-to-week baseline is so high. If the event means completing the career grand slam, the key question is whether he can capture whichever major remains unfinished before the cutoff. For a player of his level, age, and consistency, two full major seasons is enough time for at least one breakthrough, especially because he is already a frequent favorite or near-favorite in multiple majors and often puts himself in contention repeatedly rather than needing a single fluky run.
The main argument against Yes is that majors are still highly volatile relative to regular PGA Tour events. Even the best player in the world can go several years between major wins, and the grand-slam requirement may depend on one specific venue or one specific championship type that suits him less well. If he still needs more than one major to complete the set, the probability drops sharply, because a two-major gap in under 18 months would be a much harder ask than simply adding one more title.
Compared with the current market price, I think the market is pricing this as close to a long-shot, and that is probably too low if the question is about the career grand slam rather than a calendar-year sweep. The yes case is not overwhelming, but Scheffler’s elite form, sustained contention rate, and the limited time window make something in the mid-teens to mid-20s more defensible than 7%. The market may be underestimating how often a player with his profile converts contention into at least one major over a short horizon.
Arguments
For
- Scheffler is one of the few players in golf whose baseline probability of winning any given major is genuinely high.
- He has already shown the ability to win multiple majors and sustain dominance over long stretches.
Against
- Majors are difficult enough that even dominant players often fail to convert for long stretches.
- If he needs to win more than one specific major before 2028, the time window becomes a major obstacle.
Key drivers
- Scheffler’s elite overall skill level gives him a repeatable path to contending in majors.
- The event horizon is short, which limits the number of chances but still leaves multiple major starts.
- Major championships are volatile enough that even top players need some luck to complete a specific career milestone.
Risk factors
- If the question is interpreted as winning all four majors in the same period, the true probability is effectively zero.
- If Scheffler still needs more than one major to complete the set, the time window may be too short.
- A single injury, slump, or poor fit at the remaining major could sink the yes case quickly.
Scenarios
Best case
Scheffler stays healthy, remains the best player in the world, and captures the remaining major he needs within the next two seasons to complete the grand slam.
Most likely
He contends in several majors and may add another title, but the exact grand-slam requirement remains just hard enough that the event lands on No more often than Yes.
Worst case
He goes winless in the remaining majors or fails to win the specific championship required before the cutoff, leaving the grand slam incomplete.
More from this day
- PoliticsKalshi2y
Which agencies will Trump eliminate?
AI89%MKT26%Edge+63Hidden GemUSAID looks very likely to count as eliminated during Trump’s term. The reporting provided strongly suggests the agency was dismantled early, and the market price appears far too low unless the contract definition requires a formal statutory repeal that has not occurred.
- CompaniesKalshi1y
Starbucks total global stores in 2026
AI74%MKT11%Edge+63Hidden GemStarbucks is very likely to clear 41,800 global stores sometime in 2026. The market appears to be pricing in a much slower store-opening cadence than Starbucks has historically maintained.
- pop culturePolymarketTomorrow
"Resident Evil" Opening Weekend Box Office
AI82%MKT26%Edge+56Hidden GemResident Evil is more likely than not to open below 50 million domestically. That threshold is high enough that only a genuinely breakout event release would clear it, and the franchise’s historical domestic openings have usually been well under that level.