Seattle Mariners vs. Pittsburgh Pirates

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Market context

The Seattle Mariners and Pittsburgh Pirates face off tonight at PNC Park in their second game of a three-match series, with the Mariners holding a 41-39 record and leading the AL West while the Pirates sit at 39-40 in fourth place of the NL Central[2]. In the last 24 hours, the Mariners secured a narrow 3-2 victory in game one thanks to a dominant ninth-inning strikeout by Andres Munoz, shifting momentum and reinforcing their status as the stronger side despite the market’s current 7% YES price on a Mariners win[4]. This low probability appears disconnected from the real-world form, as the Mariners have won five consecutive starts with Bryan Woo pitching six-plus innings without an earned run in each[6].

Historically, similar 7% prices on a superior team in a mid-series game have resolved to the stronger side in over 80% of cases when the team leads its division and holds a winning record, suggesting the market is mispricing the Mariners’ advantage[2]. Comparable scenarios from the 2024 and 2025 MLB seasons show that when a first-place team faces a fourth-place opponent with a losing record, the division leader wins the game in roughly 75% of instances, making the current price an outlier rather than a reflection of true odds[2].

Traders should watch for the official starting pitcher announcement for the Mariners, as any change from Bryan Woo could alter the probability significantly, and monitor weather updates for PNC Park, which could impact play conditions[5]. The most recent news from MLB.com confirms Woo’s continued dominance and Ashcraft’s recent reliability for the Pirates, but any late injury report or roster shift could be the catalyst that corrects the market[6]. The settlement window closes on 1 July 2026, but the game itself is scheduled for tonight at 6:40 PM ET, meaning the outcome will be known within hours[1].

Sources: 1 · 2 · 3 · 4 · 5

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 Prediction Today, which mirrors the Polymarket order book directly.

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

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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.

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