Seattle Mariners vs. Detroit Tigers

Platform comparison

Active sub-markets

Market context

The Seattle Mariners face the Detroit Tigers in an MLB regular-season game scheduled for 6 June at 1:10 PM ET. The market's 97% implied probability for a Mariners victory reflects their stronger 2026 regular-season record and home-field advantage at T-Mobile Park. Detroit enters as a significant underdog, though single-game outcomes in baseball carry inherent volatility that historical win percentages alone do not fully capture. The settlement window extends to 13 June, allowing for postponement resolution should weather or other circumstances delay the fixture.

Comparable MLB prediction markets typically see favourites priced between 55–70% when facing weaker opponents on neutral ground; the 97% reading here suggests market participants are pricing in both Seattle's roster depth and Detroit's documented struggles this season. Recent performance trends matter considerably—the Mariners' recent win–loss record, injury status of key pitchers, and Detroit's offensive output in their last ten games all influence the current odds. Traders should monitor official MLB injury reports and starting pitcher confirmations released 24–48 hours before game time, as bullpen availability or unexpected roster changes can shift expectations materially.

From a regulatory standpoint, this market operates under UK Gambling Commission oversight and German GlüStV provisions where applicable. Traders in jurisdictions permitting prediction markets without Know Your Customer requirements up to £1,500 notional exposure may access this contract without full identity verification, though settlement and withdrawal procedures remain subject to platform-specific compliance rules. The CFTC's reach into US-based prediction market activity remains limited to contracts meeting specific criteria; this sports-settled market typically falls outside direct federal derivatives oversight.

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

Where can I trade this market with the lowest fees?

On Polymarket KYC 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 KYC 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'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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Polymarket KYC UK 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.