Seattle Mariners vs. Cleveland Guardians

Platform comparison

Active sub-markets

Market context

The real-world event is an upcoming Major League Baseball game between the Seattle Mariners and the Cleveland Guardians, scheduled for 7:10 PM ET on 26 June at Progressive Field in Cleveland. In prediction markets, a YES share pays out if the market’s condition is met (here, if the Mariners win), while a NO share pays out if it is not met. This specific market resolves to the Mariners if they win, to the Guardians if they win, and 50–50 if the game is cancelled or ends in a tie.

Historically, crowd-implied probabilities of 100% YES in single-game sports markets are rare and often signal either a mispriced event or a data error, as no MLB game has a guaranteed winner. Comparable cases from 2024–2025 show that when such extreme odds appear, they usually correct within hours once fresh information arrives, such as lineup changes or weather updates. The current 100% figure therefore warrants caution rather than confidence, as baseball outcomes remain inherently uncertain.

Traders should monitor official starting lineups, pitcher availability, and any weather delays before the game, as these are the primary catalysts that could shift the market. A recent Rotoworld Bet analysis recommended the Guardians on the moneyline, suggesting the market may be misaligned with expert projections [2]. Additionally, check MLB.TV and team broadcasts for real-time updates on pitching rotations, as a late starter change could invalidate the current 100% assumption.

Sources: 1 · 2 · 3 · 4 · 5

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 Market UK, which mirrors the Polymarket order book directly.

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 Market 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?

Prediction Market 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.

What does it cost to trade on Prediction Market UK?

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

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.

Do I need to KYC for this market?

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