Cleveland Guardians vs. Detroit Tigers

Platform comparison

Market context

On 11 August at 6:40 PM ET, the Cleveland Guardians travel to Detroit to face the Tigers in a regular-season MLB matchup. The current crowd-implied probability of 45% for a Guardians victory reflects moderate confidence in the home side, with settlement occurring seven days after the fixture. For traders building conditional logic around this market, the key input is roster availability and recent form—both teams' injury reports typically stabilise 24–48 hours before first pitch, making that window critical for algorithmic position adjustments.

Historical matchups between these AL Central rivals show the Guardians have held a slight edge in recent seasons, though home-field advantage in August carries measurable weight. The Tigers' performance trajectory through mid-August will determine whether the current 45% reflects undervaluation or appropriate pricing. Traders should monitor Cleveland's pitching rotation assignments and Detroit's recent offensive output against comparable opponents, as these factors drive sharp movement in similar fixtures.

The settlement window extends to 18 August at 22:40 UTC, providing a seven-day buffer for postponements or administrative delays. For users integrating this market into broader portfolio strategies, the key dependency is confirmation of the scheduled start time and weather conditions in Detroit during the preceding 48 hours. Any significant roster changes—particularly to starting pitchers or key position players—typically trigger repricing within hours of announcement. Tracking official MLB communications and team injury updates remains the most reliable data source for programmatic monitoring.

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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

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?

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

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.