Seattle Mariners vs. Detroit Tigers

Platform comparison

Active sub-markets

Market context

The Seattle Mariners travel to Detroit on 7 June for an afternoon fixture against the Tigers, with the settlement window extending to 14 June to accommodate any postponements. The 0% implied probability reflects either a technical glitch in market initialisation or an extreme confidence in one outcome, though historical baseball markets rarely settle at such extremes absent clear pre-game information like a confirmed roster absence.

Detroit enters June having struggled through May, whilst Seattle has maintained competitive form in the AL West. The Tigers' recent injury profile warrants scrutiny—any late confirmations regarding starting pitcher availability or key position player status could shift expectations substantially. Conversely, the Mariners' lineup depth provides relative stability, though their road record against AL Central opponents historically shows variance. Head-to-head records between these franchises carry limited predictive weight given roster turnover, but Detroit's home-field advantage at Comerica Park has historically favoured their pitching staff in June matchups.

Traders should monitor official lineups released 24 hours before first pitch, particularly any last-minute roster moves or bullpen adjustments announced by either club. Weather conditions at Detroit—temperature and wind direction—materially affect ball carry at Comerica Park. Any suspension announcements or unexpected injury updates in the 48 hours preceding the game could trigger significant repricing. The settlement window's extension to 14 June accounts for potential rain delays common in early June across the Midwest, meaning markets may remain volatile until the game concludes.

Methodology

We track Seattle Mariners vs. Detroit Tigers 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

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.