Pittsburgh Pirates vs. St. Louis Cardinals

Platform comparison

Active sub-markets

Market context

The Pirates meet the Cardinals in St Louis on 21 May, with the market currently pricing Pittsburgh at 28% to win. Recent form has cut both ways: Pittsburgh lost 10-5 in Pittsburgh on 30 April, when St Louis scored early against Paul Skenes, but the Pirates also just blanked the Cardinals 7-0 at Busch Stadium on 20 May, with Konnor Griffin, Nick Gonzales and Endy Rodríguez doing most of the damage. That split is a useful reminder that short MLB series can move sharply on starting pitching and bullpen availability rather than on season-long record alone.

For a market like this, the key comparators are the practical constraints around access and settlement rather than any special legal regime on the game itself. German users should note the GlüStV framework: licensed gambling products are tightly regulated, and prediction markets can raise classification issues depending on structure and availability. In the US, the CFTC’s reach matters because event-based contracts can fall within derivatives oversight if offered to US persons. “No-KYC up to $1,500” means a user may be able to access and trade at relatively low size without full identity verification, but that does not remove platform, tax, or residency restrictions, and it is materially relevant to how easily retail liquidity can enter this specific market.

The main catalysts are the confirmed line-ups, the starting pitchers, and any late injury or weather updates before first pitch. Because the market stays open until the game is completed if postponed, the timing of any reschedule also matters for settlement risk. A recent result like the Pirates’ shutout on 20 May is informative, but traders still need the official MLB game sheet for final resolution, particularly if there is a delay, suspension, or a rare 50-50 outcome from cancellation or tie.

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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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, PolyGram 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.