Tampa Bay Rays vs. Baltimore Orioles

Platform comparison

Active sub-markets

Market context

The Tampa Bay Rays host the Baltimore Orioles on 25 May at 1:35 PM ET in a regular-season MLB matchup. The current crowd-implied probability of 56% for a Rays victory reflects modest favouritism, though both clubs remain competitive within their division standings. Settlement occurs on 1 June at 17:35 UTC, providing a narrow window between game completion and final resolution.

Historical matchup data between these franchises shows relatively balanced outcomes over recent seasons, with neither team holding a pronounced home-field advantage in head-to-head play. The Rays' recent form, pitching rotation depth, and injury status will materially affect the probability distribution; similarly, the Orioles' offensive consistency and bullpen availability shape counterparty positioning. At 56% YES, the market has priced in baseline expectations without reflecting late-breaking roster changes or weather delays that could alter game conditions.

Traders should monitor lineup announcements and starting pitcher confirmations released 24 hours before first pitch, as these catalysts frequently shift probability by 3–5 percentage points. Deposit and withdrawal friction remains a practical constraint: traders using Klarna instalment payments or SEPA transfers should account for settlement delays when planning position exits. USDC on-chain settlement offers faster withdrawal rails for those seeking to lock in gains immediately post-resolution, whilst traditional banking methods may incur 2–3 business day clearance periods. Book depth typically increases as game time approaches, improving execution quality for larger position sizes.

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

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 PolyGram, 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.

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 PolyGram?

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

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.