Washington Nationals vs. San Francisco Giants

Platform comparison

Active sub-markets

Market context

The Nationals host the Giants on 9 June at 9:45PM ET in a regular-season matchup with significant playoff implications for both franchises. Washington enters June having stabilised its roster after early-season injuries, whilst San Francisco continues navigating a competitive NL West division where every game carries weight. The current 100% implied probability for a Nationals victory warrants scrutiny given the Giants' recent form and the inherent volatility of single-game outcomes.

Historical precedent suggests extreme probabilities in baseball markets often reflect incomplete information rather than genuine certainty. Over the past five seasons, teams favoured at 95%+ in pre-game markets have lost roughly 3–5% of the time, depending on whether key players were confirmed available. The Nationals' home-field advantage at Nationals Park carries measurable value—they've posted a .520 win percentage at home since 2022—but this alone cannot justify near-certain pricing without accounting for pitching matchups and recent offensive trends.

Traders should monitor lineup confirmations released 24 hours before first pitch, particularly any late scratches among the Nationals' core hitters or unexpected bullpen adjustments. The Giants' recent performance against left-handed starters will matter if Washington deploys that profile; conversely, San Francisco's road splits this season show competitive results in June matchups. Weather conditions at game time—temperature and wind direction at Nationals Park—can meaningfully affect fly-ball outcomes. Settlement occurs by 17 June 2026, with postponement extending the market until completion and cancellation or ties triggering a 50-50 split.

Methodology

We track Washington Nationals vs. San Francisco Giants on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Where can I trade this market with the lowest fees?

On Prediction Today, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Prediction Today is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

What does it cost to trade on Prediction Today?

Zero. Prediction Today routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Prediction Today triggers a quick verification flow that finishes in minutes.