Detroit Tigers vs. Seattle Mariners

Platform comparison

Market context

Polymarket is pricing the Tigers–Mariners contract at **47% YES** on USDC collateral, so the market is treating Detroit as a slight underdog rather than a clear coin flip. On Polygon, that price reflects the current implied chance that the Tigers win the scheduled game and that the conditional token resolves to the Detroit outcome.

That mid-40s level fits a game where recent head-to-head results have gone both ways. Detroit beat Seattle 5-4 on 7 June after also taking the earlier June meeting 7-3, but the current season context has been inconsistent rather than dominant: ESPN lists Detroit at 4-9 and Seattle at 4-9 in the game page snapshot, with Seattle carrying the stronger run prevention figures and Detroit showing the weaker team batting line. Mariners pitching has been materially better on the season sample shown there, with a 2.62 ERA and 0.95 WHIP versus Detroit’s 4.32 ERA and 1.44 WHIP.[1][2][3]

For traders, the main catalysts are the official line-up cards, any late pitching changes, and whether the game proceeds as scheduled at 9:40 p.m. ET. MLB’s preview page confirms the fixture, while the market rules mean a postponement keeps the contract open until the game is completed, and a cancellation or tie would settle 50-50. Because the contract resolves off the official final result, any pre-game scratch, weather delay, or make-up scheduling update can matter more than the opening price alone.[14]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Detroit Tigers vs. Seattle Mariners across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Polymarket Scam?. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

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?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Polymarket Scam? trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.