Seattle Mariners vs. Detroit Tigers

Platform comparison

Active sub-markets

Market context

The Seattle Mariners travel to Detroit to face the Tigers on 7 June at 1:40 PM ET, with the market settlement window extending to 14 June. The 0% implied probability for a Mariners victory represents an extreme outlier compared to standard sportsbook pricing. Major betting operators typically price regular-season MLB matchups within a 40–60 percentage range unless one team faces catastrophic roster depletion or injury. This disconnect warrants scrutiny, as prediction markets occasionally reflect information asymmetries or liquidity constraints rather than genuine analytical consensus.

Historical precedent suggests that single-game MLB markets with extreme probabilities often correct sharply once trading volume increases. During the 2023 season, comparable markets showing sub-5% odds for favoured teams frequently settled opposite to initial implied probabilities when late-breaking roster news or weather updates emerged. The Mariners' recent form and pitching availability in early June will be material factors; any last-minute starting pitcher adjustment or injury disclosure could shift fair value substantially.

Traders should monitor official roster announcements through 6 June, particularly regarding the Mariners' starting rotation and Detroit's bullpen status. Weather forecasts for Comerica Park may also influence game dynamics. Sportsbook lines from DraftKings, FanDuel, and BetMGM will provide real-time calibration against the prediction market's current extreme reading. The settlement window's extension to 14 June accommodates potential postponements, though this adds marginal uncertainty only if weather disruptions occur during the scheduled date.

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 Best Prediction Markets, 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

Is this market available outside the US?

Best Prediction Markets 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 does it cost to trade on Best Prediction Markets?

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

Do I need to KYC for this market?

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