Live prediction market odds for Seattle Mariners vs. Kansas City Royals (4:10 PM ET). Compare prices across Kalshi and Polymarket and ProphetX.
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MARKET RESOLVEDKalshi / Polymarket / ProphetX
Resolved 2026-05-23
This market resolved on 2026-05-23. Kansas City Royals spread minus 2.5 was the officially declared outcome. Prior to resolution, the market peaked at 99%.
Seattle Mariners vs. Kansas City Royals (4:10 PM ET) — MLB game held on 2026-05-23. Review the historical prediction market odds from Kalshi, Polymarket, and more on Prediction Hunt.
| Candidate |  |  |  |
|---|---|---|---|
Kansas City Royals spread minus 2.5WINNER | 99% | 100% | — |
Kansas City Royals spread minus 3.5 | 99% | 100% | — |
Kansas City Royals spread minus 1.5 | 99% |
Seattle Mariners vs. Kansas City Royals (4:10 PM ET) was a prediction market event tracked across 3 platforms (Kalshi, Polymarket, ProphetX). Kansas City Royals spread minus 2.5 led the market at 99% implied probability before resolution. Other contenders include Kansas City Royals spread minus 3.5 at 99%, Kansas City Royals spread minus 1.5 at 99%, Over 2.5 runs scored at 99%.
Kansas City Royals spread minus 2.5 held the lead at 99% implied probability heading into resolution. Behind Kansas City Royals spread minus 2.5, Kansas City Royals spread minus 3.5 at 99% and Kansas City Royals spread minus 1.5 at 99% and Over 2.5 runs scored at 99% were the next closest contenders. The 5.4% cross-platform spread suggested platforms were pricing new information differently, creating potential trading opportunities.
Here were the closing odds across Kalshi, Polymarket, ProphetX: Kansas City Royals spread minus 2.5: 99¢ on Kalshi, 100¢ on Polymarket. Kansas City Royals spread minus 3.5: 99¢ on Kalshi, 100¢ on Polymarket. Kansas City Royals spread minus 1.5: 99¢ on Kalshi, 100¢ on Polymarket. Over 2.5 runs scored: 99¢ on Kalshi. The 5.4% spread across platforms highlights where markets disagreed — a gap traders can exploit by buying low on one platform and selling high on another.
A price of 99¢ meant the market estimated a 99% chance that Kansas City Royals spread minus 2.5 would be the outcome. Traders who bought at 99¢ and held through resolution received $1.00 per share — a 1% return on their position. Those on the wrong side received $0.
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Official settlement criteria, resolution sources, and edge cases across Kalshi and Polymarket and ProphetX.
KalshiIf Kansas City wins the Seattle vs Kansas City professional baseball game originally scheduled for May 23, 2026 at 4:10 PM EDT, then the market resolves to Yes.
The following market refers to the Seattle vs Kansas City professional baseball game originally scheduled for May 23, 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 Seattle Mariners and Kansas City Royals, scheduled for May 23 at 4:10PM ET: This market will resolve to "Seattle Mariners" if the Seattle Mariners win the game. This market will resolve to "Kansas City Royals" if the Kansas City Royals 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
| 100% |
| — |
Over 2.5 runs scored | 99% | — | — |
Over 3.5 runs scored | 99% | — | — |
Over 4.5 runs scored | 99% | — | — |
Royals wins by over 4.5 runs | 99% | — | — |
Kansas City Royals | 99% | — | 97% |
Seattle Mariners | 1% | — | 6% |
Over 12.5 runs scored | 2% | — | — |
Royals wins by over 5.5 runs | 1% | — | — |
Seattle Mariners spread minus 1.5 | 1% | — | — |
Seattle Mariners spread minus 2.5 | 1% | — | — |
Seattle Mariners spread minus 3.5 | 1% | — | — |
Total over 10.5 | 1% | — | — |
Total over 11.5 | 1% | — | — |
Total over 5.5 | 1% | — | — |
Total over 6.5 | 1% | — | — |
Total over 7.5 | 1% | — | — |
Total over 8.5 | 1% | — | — |
Total over 9.5 | 1% | — | — |
Seattle Mariners spread plus 1.5 | — | 0% | — |
Seattle Mariners spread plus 2.5 | — | 0% | — |
Seattle Mariners spread plus 3.5 | — | 0% | — |
Kansas City Royals spread plus 1.5 | — | — | — |
Kansas City Royals spread plus 2.5 | — | — | — |
Kansas City Royals spread plus 3.5 | — | — | — |
Kansas City Royals spread plus 4.5 | — | — | — |
Seattle Mariners spread minus 4.5 | — | — | — |
Total under 10.5 | — | — | — |
Total under 11.5 | — | — | — |
Total under 5.5 | — | — | — |
Total under 6.5 | — | — | — |
Total under 7.5 | — | — | — |
Total under 8.5 | — | — | — |
Total under 9.5 | — | — | — |
Kansas City Royals
98.2% avg
