Seattle Mariners vs. Athletics

Platform comparison

Active sub-markets

Market context

The Seattle Mariners face the Oakland Athletics on 25 May at 9:40 PM ET in a regular-season MLB matchup. The 52% implied probability for a Mariners victory reflects modest favouring of the home side, though the Athletics remain competitive at 48%. Settlement occurs on 2 June, allowing sufficient window for any postponement or make-up fixture; cancellation or tie would trigger a 50-50 split resolution.

Historical matchups between these franchises show volatility in single-game outcomes despite broader seasonal trends. The Mariners' recent form and roster depth typically command a slight edge in head-to-head contests, yet the Athletics have demonstrated capacity to upset stronger opponents. Comparable games from the 2024 season involving these teams settled within a 5–7 percentage-point spread, suggesting the current 52–48 split aligns with conventional market pricing for divisional play without major injury disruptions or roster changes.

Traders should monitor pitching assignments and injury reports released in the 48 hours before first pitch, as starting pitcher availability materially shifts win probability. Weather conditions at the venue and any late-season roster moves announced by either franchise could trigger repricing. Deposit flows through SEPA transfers and USDC settlement have historically tracked with book depth on high-liquidity MLB fixtures; sustained funding inflows typically correlate with tighter bid-ask spreads on major league matchups, allowing traders to execute positions with reduced slippage closer to settlement.

Methodology

This page reviews Seattle Mariners vs. Athletics across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at PolyGram — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

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?

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.

Is this market available outside the US?

PolyGram 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.

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.