Live prediction market odds for Athletics vs. Seattle Mariners (9:40 PM ET). Compare prices across Kalshi and Polymarket and ProphetX.
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Kalshi / Polymarket / ProphetX
2026-04-20
Athletics vs. Seattle Mariners (9:40 PM ET) — MLB game scheduled for 2026-04-20. Compare live prediction market odds from Kalshi, Polymarket, and more on Prediction Hunt.
Seattle Mariners leads the “Athletics vs. Seattle Mariners (9:40 PM ET)” event at 59.7% implied probability, followed by Athletics at 40.8%. A 1.5% cross-platform spread signals an active arbitrage window.
Athletics vs. Seattle Mariners (9:40 PM ET) is a prediction market event currently tracked across 3 platforms (Kalshi, Polymarket, ProphetX). Seattle Mariners leads at 60% implied probability, making it the market favorite. Other contenders include Athletics at 41%.
Seattle Mariners currently leads at 60% implied probability. Behind Seattle Mariners, Athletics at 41% are the next closest contenders. A 1.5% spread across platforms indicated moderate disagreement on the latest developments.
Here are the latest odds across Kalshi, Polymarket, ProphetX: Seattle Mariners: 60¢ on Kalshi, 59¢ on Polymarket, 60¢ on ProphetX. Athletics: 41¢ on Kalshi, 41¢ on Polymarket, 41¢ on ProphetX. The 1.5% spread shows moderate platform divergence worth monitoring for potential opportunities.
A price of 60¢ means the market estimates a 60% probability that Seattle Mariners 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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Official settlement criteria, resolution sources, and edge cases across Kalshi and Polymarket and ProphetX.
KalshiIf Seattle wins the A's vs Seattle professional baseball game originally scheduled for Apr 20, 2026 at 9:40 PM EDT, then the market resolves to Yes.
The following market refers to the A's vs Seattle professional baseball game originally scheduled for Apr 20, 2026 at 9:40 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 Athletics and Seattle Mariners, scheduled for April 20 at 9:40PM ET: This market will resolve to "Athletics" if the Athletics win the game. This market will resolve to "Seattle Mariners" if the Seattle Mariners 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
Seattle Mariners
59.7% avg
