PGA Tour: 3M Open Top 20

Platform comparison

Market context

The 3M Open at TPC Twin Cities runs from 23–26 July and the PGA Tour lists an $8.8 million purse, a 500-point FedExCup event, and a field that includes Scottie Scheffler, Hideki Matsuyama and several other high-end players[2][4]. Against that backdrop, an 81% crowd-implied **Yes** price suggests the market is already leaning heavily towards the selected player making the cut into a top-20 finish, with ties counting under the rules. In platform-comparison terms, Polymarket-style pricing is usually read as implied probability, whereas Betfair or Smarkets users often think in decimal odds and then back out the same probability; fees and access differ materially, since exchange commissions and KYC/eligibility checks can change the effective price paid compared with a prediction market quote.

Historically, top-20 PGA Tour props at a standard 72-hole event tend to be sensitive to one or two poor rounds because the margin between 15th and 35th can be very small, especially when the field is reasonably strong rather than elite. This week’s field was announced as 144 players with 53 of the top 125 in the Official World Golf Ranking, which is competitive enough that a near-top-20 outcome is plausible but not trivial[3]. The 2025 and 2024 winners posted winning scores of -23 and -17 respectively, showing that TPC Twin Cities can produce low scoring and compressed leaderboards, which tends to keep top-20 probabilities elevated for in-form players but also leaves room for volatility on moving day[4].

Traders should watch tee-time waves, injury or withdrawal news, and whether the chosen player is keeping pace through the first two rounds, because top-20 markets often move sharply once a player starts near the lead or falls outside the cut line. The PGA Tour leaderboard is the primary settlement source and the market resolves **No** if official results are not final by 1 August at 8:00 PM ET, so delayed publication would matter even if play finishes on time[2]. For cross-platform comparison, Kalshi may offer a directly comparable event contract if listed, while Betfair and Smarkets usually provide exchange liquidity but can differ on margin and commission; in practice, that means the same 81% view can look cheaper or dearer depending on whether the trader is seeing probability, back price, or net-after-fees economics.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares PGA Tour: 3M Open Top 20 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 Polymarket Alternative, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). On-chain settlement clears in minutes — the fastest payout path of the four.

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.

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 is accessible globally?

Polymarket is geo-blocked in the US/UK/EU. Kalshi is US-only. Betfair and Smarkets are UK-restricted. Polymarket Alternative has a different geo footprint and routes to Polymarket's order book at 0% fees.

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.