PGA Tour: The Open Championship Winner

Platform comparison

Market context

The 2026 The Open Championship will crown its winner at Royal Troon in July, with Scottie Scheffler installed as the book favourite to defend the Claret Jug he secured in 2025[1][4]. The prediction market currently shows an 11% implied probability for the selected player, a figure that diverges notably from traditional sportsbooks where Scheffler holds roughly a 25% chance at +300 odds[2]. This discrepancy highlights how Polymarket’s decimal-implied probability format often lags behind the faster-moving decimal odds on Kalshi or Betfair, where liquidity and fee structures can compress spreads more aggressively than peer-to-peer platforms like Smarkets.

Historically, Open winners with single-digit implied probabilities under 15% have frequently been unlisted outsiders, as seen when unranked players upset top-tier favourites in recent majors. The current 11% probability suggests the market is pricing in significant volatility, mirroring past cases where favourites like McIlroy or Fleetwood failed to convert high odds into victory despite strong form[1][5]. Traders should monitor Scheffler’s schedule confirmation and any injury updates, as his elimination would instantly resolve the market to “No” under official rules[1]. Recent coverage confirms Scheffler remains the top pick across major books, but his dominance is not guaranteed, with Rahm and McIlroy offering competitive value at 20/1 and 9/1 respectively[1][4].

Watch for the final player list announcement and tee-time releases, which often trigger sharp probability shifts on prediction platforms. Kalshi’s KYC requirements may limit access for some traders compared to Betfair’s global reach, while Smarkets’ lower fees could attract volume that Polymarket’s current liquidity cannot match. The settlement window closes on 19 July 2026, aligning with the tournament’s final day, ensuring resolution occurs immediately after the official winner is declared[1].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares PGA Tour: The Open Championship Winner specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. The live probability is the Polymarket mid; the comparison columns summarise each venue's fee structure, KYC, settlement currency and payment rails. Every CTA routes to Kalshi Alternative UK, which mirrors the Polymarket order book at 0% fees.

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

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.

What about Smarkets as an alternative?

Smarkets is a UK betting exchange with a lower default commission (2%) than Betfair. Liquidity on political markets is below Polymarket, comparable to Kalshi. Geo-blocked in many jurisdictions.

Which platform supports Klarna/SOFORT?

Directly: none. Polymarket accepts only USDC on Polygon. Kalshi Alternative UK offers a fiat on-ramp via Klarna or SOFORT (DE/AT/CH) and converts internally to USDC for the Polymarket order book. T+1 processing.