Pittsburgh Pirates vs. St. Louis Cardinals

Platform comparison

Active sub-markets

Market context

The Pittsburgh Pirates play the St. Louis Cardinals at Busch Stadium on 21 May, with the market set on the outright winner. The crowd has Pittsburgh at 27% yes, which is a low bar for a road team and usually reflects a mix of weaker underlying form and the fact that baseball books can widen quickly once a home side has recent results and pitching clarity. The recent head-to-head record has favoured St. Louis: the Cardinals are 4-1 in the last five meetings with Pittsburgh, according to StatMuse, and they have already taken a 10-5 win and an 11-7 win in this series of match-ups this spring.

That pricing also sits against the way this market is likely to trade: small, fast-moving deposits and withdrawals tend to matter more than in major liquid sporting events. Where funding is easy — card payments, Klarna-style on-ramp options, or same-day USDC/SEPA rails — participation can build book depth quickly; where it is not, prices can stay softer and more reactive to line-up news. The recent Pirates shutout win over St. Louis on 20 May, reported by ESPN and MLB video highlights, is the clearest fresh catalyst, but the next swing factor is confirmation of starting pitchers and any late scratch news before first pitch. If either side changes its starter or regular bats, that is usually when these low-to-mid probability baseball markets move most sharply.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

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.

What does it cost to trade on PolyGram?

Zero. PolyGram routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

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.

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.