Pittsburgh Pirates vs. St. Louis Cardinals

Platform comparison

Active sub-markets

Market context

The Pirates and Cardinals meet again in St Louis after Pittsburgh’s 7-0 shutout on Wednesday night, a result that levelled the series and snapped the Pirates’ four-game losing streak. That win followed a very different meeting only three weeks earlier, when St Louis completed a four-game sweep in Pittsburgh with a 10-5 victory on 30 April, so the recent head-to-head has swung both ways. For a market sitting at 28% YES on the Pirates, the immediate read is that the crowd is still treating St Louis as the likelier side, but not by a wide margin.

Recent comparable results suggest the market should be driven more by starting pitching and lineup form than by the last box score alone. CBS Sports’ game report on Wednesday noted Spencer Horwitz’s homer and Konnor Griffin’s four-hit night in the Pirates’ shutout, while ESPN’s recap of the April sweep shows the Cardinals were able to punish Pittsburgh when they got early offence. That kind of split is common in divisional match-ups: one team can look dominant on one night, then ordinary a day later, especially when the clubs are familiar with each other and the venue stays the same.

For traders, the key catalyst is the confirmed line-up and starting-pitcher context before the 1:15pm ET first pitch, plus any late scratches that alter either side’s run production. The market is leaning on Wednesday’s Pirates rebound against the memory of St Louis’ earlier sweep, so any announcement that reinforces the Cardinals’ edge on the mound would support the current pricing, while a second straight Pittsburgh win would push back against it. The official MLB scoreboard and team injury updates will be the main sources to watch as game time approaches.

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Methodology

This page tracks Pittsburgh Pirates vs. St. Louis Cardinals across four political prediction venues. Live odds come from the Polymarket order book (the deepest political prediction-market book). Kalshi is the CFTC-regulated US alternative, Betfair the established UK sports-exchange with politics markets, Manifold the open play-money variant. PolyGram routes every trade through to Polymarket — at 0% fees.

Resolution & payout

Political markets typically settle on official candidate or agency confirmation. Polymarket uses UMA Optimistic Oracle: a proposer posts the outcome with a bond, the two-hour window opens, then the smart contract pays USDC.

Kalshi settles USD via CFTC clearinghouse, with clearly defined resolution sources (e.g. AP race calls for elections). Betfair settles after the official outcome is registered with the league or agency. Manifold is play-money.

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.

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 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.