Seattle Mariners vs. Athletics

Platform comparison

Active sub-markets

Market context

The Seattle Mariners travel to Oakland on 25 May for a night fixture against the Athletics, with first pitch at 9:40PM ET. The 52% crowd probability favours Seattle, reflecting their stronger 2024 regular-season record and recent performance metrics. For algorithmic traders, this represents a relatively tight market—the implied gap suggests neither team commands overwhelming confidence, making it suitable for conditional order strategies that trigger on roster announcements or weather updates.

Historical matchups between these clubs show Seattle has maintained a slight edge in head-to-head records over recent seasons, though Oakland has produced occasional upset victories that complicate straight-line projections. The current probability sits within the typical range for games between mid-tier and stronger AL West competitors, comparable to similar fixtures where the favoured team carries 50–55% likelihood. Traders monitoring Elo ratings or Pythagorean win expectations would find this market neither extreme nor obviously mispriced against standard baseball models.

Key variables for position management include starting pitcher assignments—confirmed typically 24–48 hours before game time—and any late injury reports affecting either lineup. Weather conditions at Oakland Coliseum can influence play, particularly wind direction affecting fly balls. The settlement window extends to 2 June, providing buffer time for postponements, though cancellations without rescheduling would trigger the 50-50 resolution clause. Automated systems should flag official MLB communications regarding roster changes or weather delays, as these frequently shift implied probabilities in the final hours before first pitch.

Methodology

This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to PolyGram, which mirrors the Polymarket order book directly.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

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.

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 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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, PolyGram 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.