Pittsburgh Pirates vs. St. Louis Cardinals

Platform comparison

Active sub-markets

Market context

Polymarket is pricing the Pittsburgh side at about 28% yes on USDC-settled conditional tokens on Polygon, so the market is treating a Pirates win as a clear underdog outcome rather than a coin flip. The contract tracks the actual result of today’s scheduled MLB game in St Louis, with settlement following the official final statistics; if the game is postponed, the market stays open until it is played. At this level, traders are effectively saying St Louis is the more likely winner unless the price has already adjusted for a late lineup or pitching change.

Recent head-to-head results offer a useful frame, but they also show how quickly baseball can turn. St Louis won 11-7 in Pittsburgh on 28 April, while the Cardinals then completed a four-game sweep there on 30 April with a 10-5 win, suggesting they had the better bat-to-ball profile in that series. However, Pittsburgh answered emphatically on 20 May with a 7-0 shutout at Busch Stadium, per MLB and ESPN, snapping a four-game skid and reminding traders that short-run form can swing sharply between meetings.

For the live read, the main catalysts are line-up confirmation, starting pitcher news, and any weather or postponement risk, since those factors can move a USDC market before first pitch. The Pirates’ shutout on Tuesday, led by Konnor Griffin’s four-hit game and support from Nick Gonzales and Endy Rodríguez, came via a team-wide effort reported by MLB, which may matter if it changes bullpen usage or confidence entering the rematch. Any late adjustment to the cardinals’ or pirates’ starter, or a change in game start time, would be the most relevant dependency for the on-chain contract.

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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

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

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.

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.