Live prediction market odds for Kansas City Royals vs. St. Louis Cardinals (8:15 PM ET). Compare prices across Kalshi and Polymarket.
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Kalshi / Polymarket
2026-05-15
Kansas City Royals vs. St. Louis Cardinals (8:15 PM ET) — MLB game scheduled for 2026-05-15. Compare live prediction market odds from Kalshi, Polymarket, and more on Prediction Hunt.
St. Louis Cardinals leads the “Kansas City Royals vs. St. Louis Cardinals (8:15 PM ET)” event at 50.5% implied probability, followed by Kansas City Royals at 49.0%. A 3.0% cross-platform spread signals an active arbitrage window.
Kansas City Royals vs. St. Louis Cardinals (8:15 PM ET) is a prediction market event currently tracked across 2 platforms (Kalshi, Polymarket). St. Louis Cardinals leads at 51% implied probability, making it the market favorite. Other contenders include Kansas City Royals at 49%.
St. Louis Cardinals currently leads at 51% implied probability. Behind St. Louis Cardinals, Kansas City Royals at 49% are the next closest contenders. A 3.0% spread across platforms indicated moderate disagreement on the latest developments.
Here are the latest odds across Kalshi, Polymarket: St. Louis Cardinals: 52¢ on Kalshi, 50¢ on Polymarket. Kansas City Royals: 48¢ on Kalshi, 51¢ on Polymarket. The 3.0% spread shows moderate platform divergence worth monitoring for potential opportunities.
A price of 51¢ means the market estimates a 51% probability that St. Louis Cardinals will be the outcome. Buying one share at 51¢ pays out $1.00 if correct — a 96% return — or $0 if wrong. This is the core mechanic of prediction markets: the price directly reflects the crowd's probability estimate.
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St. Louis Cardinals
50.5% avg
