Pittsburgh Pirates vs. St. Louis Cardinals

Platform comparison

Active sub-markets

Market context

The Pirates and Cardinals meet in a divisional MLB game on 21 May, with the market settling on the official result once the game is completed. St Louis reached this matchup having already taken the most recent meeting in the series, a 10-5 win on 30 April, while Pittsburgh responded with a 7-0 shutout on 20 May to level the current set. That split helps explain a crowd-implied 28% YES on Pittsburgh: the Pirates have a live path, but the Cardinals have recently shown they can score early and win at home, and the market is pricing them as the clear favourite.

For traders, the main near-term inputs are the confirmed line-ups, starting pitcher announcement, and whether any weather or schedule issue pushes the game beyond the settlement window; if postponed, the market stays open until the make-up game is finished. Recent coverage from MLB and ESPN has already highlighted the swing in form across the last two games, with Pittsburgh’s bullpen just preserving a shutout and St Louis previously breaking open the series with offence. On access, the market sits in the grey area relevant to German GlüStV treatment and potential US CFTC reach, while “no-KYC up to $1,500” means a user can typically trade below that threshold without full identity checks, but that does not remove local legal or tax obligations.

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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.

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.

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.