Seattle Mariners vs. Washington Nationals

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Active sub-markets

Market context

The Seattle Mariners travel to Washington for a day game against the Nationals on 14 June at 1:35 PM ET, with the market currently pricing the Mariners at 99% implied probability. This valuation reflects Seattle's standing as a playoff contender in the AL West, whilst Washington remains in rebuilding mode within the NL East. The Nationals have won just 28 games through mid-June in recent seasons, creating substantial baseline expectation gaps between these franchises.

Historical matchups between these teams show Seattle has dominated in recent years, winning approximately 65% of meetings since 2020. The Mariners' roster depth, particularly in starting pitching, typically outmatches Washington's rotation quality. However, single-game outcomes remain volatile; the Nationals have pulled off upsets against stronger opponents at home, and day games following night games can introduce fatigue variables that shift matchup dynamics unpredictably.

Key catalysts to monitor include confirmed starting pitcher assignments, which should be announced 24 hours before first pitch. Injury updates to either team's lineup—particularly any late withdrawals from Seattle's core hitters—could narrow the probability gap. Weather conditions at Nationals Park may also factor into play, as humidity and wind patterns in mid-June can favour certain pitching profiles. Recent form matters less in single-game markets than roster composition and pitching matchups, so focus on those elements rather than win streaks when assessing whether the 1% Nationals price holds value.

Methodology

This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to Prediction Today, which mirrors the Polymarket order book directly.

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 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.

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 fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

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.