Seattle Mariners vs. Cleveland Guardians

Platform comparison

Active sub-markets

Market context

The underlying event is the MLB game between the Seattle Mariners and Cleveland Guardians scheduled for 7:10PM ET on Friday, 26 June at Progressive Field, where the Mariners won the opening contest 3–1. This market resolves to "Seattle Mariners" if they win the game, to "Cleveland Guardians" if they win, and remains open if postponed; a cancellation or tie forces a 50–50 split. The current crowd-implied probability of 100% YES for the Mariners is starkly at odds with the reality that the game has already been played and the Mariners secured victory, meaning the market should be settled immediately rather than remaining open.

Historical precedents for such markets show that when a game is completed before settlement, traders expect rapid resolution based on official final statistics, not prolonged uncertainty. In comparable MLB cases, markets where the outcome was known but the settlement window lingered were corrected within hours once the primary resolution source—official final stats—was confirmed. The 100% probability here reflects a mispricing: the Mariners have already won, so the market should resolve to "Seattle Mariners" without delay, as the result is no longer contingent on future play.

Traders must watch for the official announcement of the final score from MLB.com and ESPN, which already confirm the 3–1 Mariners win [1][5]. The key catalyst is the settlement mechanism triggering once the primary resolution source validates the result; any delay in closing the market is an anomaly. With the Mariners' 42–41 record and strong road form contrasted against the Guardians' 42–40 standing, the line has already moved decisively post-game [1][2]. No suspensions or injuries are pending, as the game is complete, and the head-to-head record now shows Seattle leading 1–0 in this series [1]. The settlement window ending 2026-07-03 is irrelevant given the outcome is known.

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 Champions League Prediction, which mirrors the Polymarket order book directly.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Is this market available outside the US?

Champions League Prediction 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.

What does it cost to trade on Champions League Prediction?

Zero. Champions League Prediction 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.