Live prediction market odds for Tampa Bay Rays vs. Boston Red Sox (4:10 PM ET). Compare prices across Kalshi and Polymarket.
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Kalshi / Polymarket
2026-05-09
Tampa Bay Rays vs. Boston Red Sox (4:10 PM ET) — MLB game scheduled for 2026-05-09. Compare live prediction market odds from Kalshi, Polymarket, and more on Prediction Hunt.
Boston Red Sox leads the “Tampa Bay Rays vs. Boston Red Sox (4:10 PM ET)” event at 60.0% implied probability, followed by Tampa Bay Rays at 38.5%. A 12.0% cross-platform spread signals an active arbitrage window.
Tampa Bay Rays vs. Boston Red Sox (4:10 PM ET) is a prediction market event currently tracked across 2 platforms (Kalshi, Polymarket). Boston Red Sox leads at 60% implied probability, making it the market favorite. Other contenders include Tampa Bay Rays at 39%.
Boston Red Sox currently leads at 60% implied probability. Behind Boston Red Sox, Tampa Bay Rays at 39% are the next closest contenders. The 12.0% cross-platform spread suggested platforms were pricing new information differently, creating potential trading opportunities.
Here are the latest odds across Kalshi, Polymarket: Boston Red Sox: 54¢ on Kalshi, 66¢ on Polymarket. Tampa Bay Rays: 43¢ on Kalshi, 34¢ on Polymarket. The 12.0% spread across platforms highlights where markets disagree — a gap traders can exploit by buying low on one platform and selling high on another.
A price of 60¢ means the market estimates a 60% probability that Boston Red Sox will be the outcome. Buying one share at 60¢ pays out $1.00 if correct — a 67% 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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Boston Red Sox
60.0% avg
