Pittsburgh Pirates vs. St. Louis Cardinals

Platform comparison

Active sub-markets

Market context

The Pittsburgh Pirates and St. Louis Cardinals are due to meet in a regular-season MLB game that has already drawn a crowd-implied 100% YES price on the Pirates. That reading should be treated as a market signal, not a result: these contracts settle only on the official final score, and if the game is postponed it stays open until played. In practice, accessibility depends on the venue’s rules as much as the sporting schedule. For users in Germany, GlüStV restrictions can affect whether participation is permitted, while US CFTC reach matters because some event contracts are not available to US persons. Where offered, “no-KYC up to $1,500” generally means smaller balances can be used without full identity verification, but that limit is platform-specific and does not remove jurisdictional screening.

Recent comparable meetings have shown how quickly these prices can move on pitching and lineup news rather than season-long records. The clubs split their April series in Pittsburgh after St Louis opened with a 10-5 win, then the Pirates answered with a 7-0 shutout the next day, with ESPN and MLB both reflecting the swing in form. That kind of short sample matters because a single late scratch, bullpen change or weather delay can alter the fair price more than the headline market suggests.

Traders will want to watch the confirmed starters, batting orders and any travel or postponement updates right up to first pitch, especially if the game is affected by rain or a schedule shuffle. Official MLB game notes, team announcements and live score services have been the key dependency points for recent Cardinals–Pirates contests, while ESPN’s game pages have shown final scores and recaps promptly after completion. The settlement window running to 27 May leaves room for a make-up fixture if the original date is lost, which is relevant to how the contract could still resolve.

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Methodology

This page reviews Pittsburgh Pirates vs. St. Louis Cardinals 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

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

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.

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.

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.