PGA Tour: The Open Championship Winner

Platform comparison

Market context

The 2026 The Open Championship at Royal Troon will crown the golfer who claims the Claret Jug, with Scottie Scheffler installed as the 11/2 favourite to defend his 2025 title [1]. Current crowd-implied probability sits at 11% YES for the listed player, a figure that diverges sharply from traditional sportsbooks assigning Scheffler a 25% chance at +300 odds [2]. This gap highlights how Polymarket’s decimal-implied probability model contrasts with Kalshi’s regulatory-compliant decimal odds and Betfair’s fee-heavy exchange structure, where liquidity often compresses spreads differently than on unregulated platforms.

Historically, Open winners with sub-15% implied probabilities have included Rory McIlroy in 2014 (12%) and Henrik Stenson in 2016 (9%), suggesting the current 11% line is not an outlier for a credible contender [1]. However, Scheffler’s repeated favouritism mirrors Dustin Johnson’s 2020 dominance, where odds tightened to 4/1 before victory [4]. Traders should monitor Scheffler’s US Open form and McIlroy’s European Tour schedule, as both players’ recent withdrawals from pre-tournament events could shift odds [5]. Jon Rahm’s +1600 price on Las Vegas Sports Betting offers a value angle if Scheffler falters, though his injury history remains a dependency [3].

Kalshi’s KYC requirements may limit access for international traders compared to Smarkets’ lighter verification, while Betfair’s 5% commission could erode returns on long-tail bets like Rahm’s 16/1 [5]. The market resolves to “No” if a listed player is eliminated under official rules, a clause absent on traditional books but standard on prediction platforms. Watch for the final course draw announcement on 16 July, which often triggers odds movements as players’ course-fit assessments evolve [4].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We read PGA Tour: The Open Championship Winner from four platform perspectives: Polymarket (on-chain CLOB), Kalshi (CFTC-regulated exchange), Betfair Exchange (sports book exchange), Smarkets (peer-to-peer betting exchange). Polymarket's live mid is the canonical probability; the side-by-side columns benchmark fees, KYC, settlement currency and deposit rails so you can choose the venue that fits your jurisdiction and trade size.

Resolution & payout

Polymarket settles via UMA Optimistic Oracle on Polygon. A proposer posts the outcome with a bond, the two-hour window runs, then the smart contract pays USDC.

Kalshi settles USD through the CFTC-regulated clearinghouse — the cleanest variant, with heavier KYC. Betfair Exchange settles in account currency (GBP/EUR), net of 2-5% commission. Smarkets follows the same model as Betfair with a lower default 2% commission.

FAQ

Polymarket vs Kalshi — which is better?

Depends on your location. Kalshi is CFTC-regulated, US-only with full KYC. Polymarket is global, on-chain, no KYC up to $1,500. Polymarket has ~10x higher liquidity but higher regulatory risk.

What does Polymarket cost vs Kalshi?

Polymarket: 0% fees, only Polygon network costs (~$0.01/trade). Kalshi: up to 7% per trade plus spread. For high-frequency traders, Polymarket is dramatically cheaper.

Which platform has the deepest liquidity?

Polymarket — by a wide margin. Top markets reach $50-500M volume, Kalshi ~$200M cumulative, Betfair similar. Deeper liquidity means your trade moves the quote less.

Is Betfair a Polymarket alternative?

Only partially. Betfair Exchange is UK-focused with a sports-betting emphasis; they have politics markets but with thinner liquidity than Polymarket. Settlement in GBP/EUR, 2-5% commission on winnings.

Are all these platforms regulated?

No. Kalshi is CFTC-regulated (US). Betfair and Smarkets are UK Gambling Commission licensed. Polymarket operates without explicit regulation — a different risk profile than a regulated sportsbook.