Seattle Mariners vs. Cleveland Guardians

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Active sub-markets

Market context

The Seattle Mariners defeated the Cleveland Guardians 3-1 in their MLB game on Friday, 26 June 2026, at Progressive Field in Cleveland, with Colt Emerson’s seventh-inning homer and J.P. Crawford’s go-ahead single securing the win[1][7]. This outcome directly resolves the prediction market titled “Seattle Mariners vs. Cleveland Guardians” to “YES” for the Mariners, aligning with the current crowd-implied probability of 100% YES[1].

Historically, similar MLB prediction markets have resolved definitively once official final statistics are confirmed by the league, as seen in prior seasons where games ending in clear wins triggered immediate settlement without delay[3]. The 100% probability here reflects the market’s confidence in the Mariners’ victory, consistent with pre-game moneyline odds that favoured Seattle at -108 versus Cleveland at -112, though some models had cautiously recommended the Guardians[3].

Traders should monitor any post-game regulatory announcements regarding GlüStV compliance in Germany or CFTC reach in the US, particularly concerning the “no-KYC up to $1,500” threshold that enables accessible participation for UK and EU users without identity verification[3]. While the game has concluded, dependencies include whether MLB confirms the result as official and whether any appeals or data corrections arise, though such events are rare in standard MLB outcomes[1]. Recent coverage from ESPN and Yahoo confirms the final score and player performances, reinforcing the market’s resolution certainty[1][3].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Seattle Mariners vs. Cleveland Guardians 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 Polymarket Legal 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 Legal 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 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.