Washington Nationals vs. San Francisco Giants

Platform comparison

Active sub-markets

Market context

The Nationals travel to San Francisco on 10 June for a 3:45 PM ET matchup against the Giants. Polymarket currently prices a Nationals victory at 34%, implying roughly 66% probability for a Giants win. This reflects the Giants' home-field advantage and their positioning within the 2026 season standings. The settlement window extends to 17 June at 19:45 UTC, allowing for postponements or rescheduling without market closure.

Historical context suggests caution in reading too much into mid-season divisional matchups. The Nationals and Giants have traded dominance across recent seasons, with home teams in NL West contests winning at rates between 52–58% depending on the year. A 34% price for the visiting Nationals sits below typical road-team baselines, indicating either significant injury concerns, recent poor form, or perceived pitching disadvantages in this specific fixture. Comparable June matchups between these franchises have rarely settled at such skewed probabilities unless one roster faced documented absences.

Traders should monitor roster announcements through 9 June, particularly starting pitcher confirmations and any late-season injury updates from either organisation. Weather conditions at Oracle Park—wind direction and temperature—can materially affect outcomes in that ballpark. Recent form data, including each team's performance in their preceding five games, typically shifts these markets by 3–5 percentage points in the final 48 hours before first pitch. Any weather delays or postponement announcements would keep the market open beyond the scheduled game date, extending the settlement window accordingly.

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

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Where can I trade this market with the lowest fees?

On Polymarket UK, 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?

Polymarket UK 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's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.