Live prediction market odds for Tampa Bay Rays vs. Boston Red Sox (4:10 PM ET). Compare prices across Kalshi and Polymarket and ProphetX.
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Kalshi / Polymarket / ProphetX
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 53.6% implied probability, followed by Tampa Bay Rays at 45.9%. A 16.5% 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 3 platforms (Kalshi, Polymarket, ProphetX). Boston Red Sox leads at 54% implied probability, making it the market favorite. Other contenders include Tampa Bay Rays at 46%.
Boston Red Sox currently leads at 54% implied probability. Behind Boston Red Sox, Tampa Bay Rays at 46% are the next closest contenders. The 16.5% cross-platform spread suggested platforms were pricing new information differently, creating potential trading opportunities.
Here are the latest odds across Kalshi, Polymarket, ProphetX: Boston Red Sox: 56¢ on Kalshi, 46¢ on Polymarket, 59¢ on ProphetX. Tampa Bay Rays: 38¢ on Kalshi, 55¢ on Polymarket, 45¢ on ProphetX. The 16.5% 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 54¢ means the market estimates a 54% probability that Boston Red Sox will be the outcome. Buying one share at 54¢ pays out $1.00 if correct — a 85% 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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Official settlement criteria, resolution sources, and edge cases across Kalshi and Polymarket and ProphetX.
KalshiIf Tampa Bay wins the Tampa Bay vs Boston professional baseball game originally scheduled for May 9, 2026 at 4:10 PM EDT, then the market resolves to Yes.
The following market refers to the Tampa Bay vs Boston professional baseball game originally scheduled for May 9, 2026 at 4:10 PM EDT. If this game is postponed or delayed, the market will remain open and close after the rescheduled game has finished (within two days). If the game is cancelled or rescheduled to over two days away, the market will resolve to a fair price in accordance with the rules.
PolymarketIn the upcoming MLB game between the Tampa Bay Rays and Boston Red Sox, scheduled for May 9 at 4:10PM ET: This market will resolve to "Tampa Bay Rays" if the Tampa Bay Rays win the game. This market will resolve to "Boston Red Sox" if the Boston Red Sox win the game. If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, or ends in a tie, this market will resolve 50-50. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.
ProphetXSports moneyline - resolves based on official game outcome per ProphetX Prediction Rules
Boston Red Sox
53.6% avg
