Seattle Mariners vs. Pittsburgh Pirates

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Active sub-markets

Market context

The upcoming MLB clash between the Seattle Mariners and Pittsburgh Pirates, scheduled for 6:40pm ET on 24 June, is a straightforward contest where the winner of the game determines the market outcome. With the current crowd-implied probability sitting at 0% for the Mariners to win, the market is effectively pricing in a Pirates victory or a draw, despite the Mariners holding a 41-39 record compared to the Pirates' recent 3-2 form in their last five games[1][2]. Programmatically, a bot evaluating this 0% signal would flag a potential mispricing, as historical data shows the Mariners are 15-16 straight up this season and the under has hit 2-8 in the last ten Pirates home games when they are favourites[3].

Traders should monitor probable pitcher lineups and any late injury announcements before the settlement window closes on 1 July 2026, as these dependencies directly impact the 7.5-run combined total set for the game[2][6]. Recent coverage confirms the Pirates are 21-18 in their road games against the spread, suggesting a resilience that could justify the current pricing if the Mariners' pitching struggles continue[1]. A conditional order strategy would likely wait for the official final statistics release, as the market remains open if the game is postponed, ensuring the resolution source remains the recognised official final score[5]. The 0% probability implies a near-certainty of a Pirates win, yet the Mariners' 24-24 record against the spread indicates they are not as weak as the market suggests[3].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Seattle Mariners vs. Pittsburgh Pirates on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

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 Polymarket Bot UK, 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?

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.

What does it cost to trade on Polymarket Bot UK?

Zero. Polymarket Bot UK 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.