Boston Red Sox vs. Seattle Mariners

Platform comparison

Active sub-markets

Market context

The Boston Red Sox are scheduled to play the Seattle Mariners at T-Mobile Park, with first pitch listed for 4:10pm ET and live market pricing already implying an **82%** chance of a Red Sox win. The market is straightforward to automate: a bot can treat the final official score as the sole decisive input, while postponement keeps the contract alive until completion and cancellation or a tie pushes it to a 50-50 settlement[1][5][8].

For context, an 82% print is typically a strong but not final favourite, so it still leaves room for late information to matter, especially in baseball where starting pitchers, bullpen availability and line-up scratches can move a game materially. MLB’s own preview noted that Boston starter Payton Tolle had allowed three runs or fewer in nine of his ten starts this season, which helps explain why the market may have leaned heavily towards Boston before first pitch[6]. The Red Sox also arrived off a 6-2 win over Seattle in the previous game on 19 June, a recent comparable result that likely fed into short-term sentiment without changing the mechanics of settlement[2].

A practical trader watching this market would focus on the official game status, line-ups, and any rain-related delay notices, because the settlement window runs through 28 June if the game is not completed on schedule. If the game is moved, the contract stays open until it is finished; if it is abandoned with no make-up or ends level, resolution is explicitly 50-50, so programme rules should branch on MLB’s official final statistics rather than a live scoreboard alone[1].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Boston Red Sox vs. Seattle Mariners 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 Polymarket Bot UK — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

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

Is this market available outside the US?

Polymarket Bot UK 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.

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?

Not under $1,500 of lifetime trading volume. Above that threshold, Polymarket Bot UK 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.