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Athletics vs. Seattle Mariners
Prediction market · Polymarket
Overview
In the upcoming MLB game between the Athletics and Seattle Mariners, scheduled for April 21 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.
Ticker
mlb-oak-sea-2026-04-21
Volume
489.9K
Open interest
356.4K
Liquidity
—
Start
Apr 15, 2026
End
Apr 29, 2026
Status
Closed
Access
Restricted
Created
Apr 22, 2026
Resolution source
https://www.mlb.com/
Event ID
381959
Slug
mlb-oak-sea-2026-04-21
Markets
8
Raw event data
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"slug": "mlb-oak-sea-2026-04-21",
"title": "Athletics vs. Seattle Mariners",
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"updatedAt": "2026-04-23T06:12:45.542939Z",
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"description": "In the upcoming MLB game between the Athletics and Seattle Mariners, scheduled for April 21 at 9:40PM ET:\n\nThis market will resolve to \"Athletics\" if the Athletics win the game.\n\nThis market will resolve to \"Seattle Mariners\" if the Seattle Mariners win the game.\n\nIf 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.\n\nThe 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.",
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"description": "In the upcoming MLB game between the Athletics and Seattle Mariners, scheduled for April 21 at 9:40 PM ET:\n\nThis market will resolve to \"Yes\" if at least one run is scored in the 1st inning by either the Athletics or Seattle Mariners.\n\nThis market will resolve to \"No\" if no runs are scored in the 1st inning by either team.\n\nIf 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, this market will resolve 50-50.\n\nTo know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game.\n\nThe 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.",
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"description": "In the upcoming MLB game between the Athletics and Seattle Mariners, scheduled for April 21 at 9:40 PM ET:\n\nThis market will resolve to \"Seattle Mariners\" if the Seattle Mariners win the game by 2 or more runs.\n\nOtherwise, this market will resolve to \"Athletics\". If the game ends in a tie, this market will resolve to \"Athletics\".\n\nIf 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, this market will resolve 50-50.\n\nTo know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game.\n\nThe 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.",
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"description": "In the upcoming MLB game between the Athletics and Seattle Mariners, scheduled for April 21 at 9:40 PM ET:\n\nThis market will resolve to \"Over\" if the Athletics and Seattle Mariners combine to score 8 or more runs in this game.\n\nIf the combined total is less than 8, this market will resolve to \"Under\".\n\nIf 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, this market will resolve 50-50.\n\nTo know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game.\n\nThe 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.",
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"description": "In the upcoming MLB game between the Athletics and Seattle Mariners, scheduled for April 21 at 9:40 PM ET:\n\nThis market will resolve to \"Over\" if the Athletics and Seattle Mariners combine to score 9 or more runs in this game.\n\nIf the combined total is less than 9, this market will resolve to \"Under\".\n\nIf 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, this market will resolve 50-50.\n\nTo know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game.\n\nThe 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.",
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}- Athletics vs. Seattle MarinersVol 425.3KLiq —End Apr 29, 2026Closed
- Athletics vs. Seattle Mariners: O/U 6.5Vol 1.5KLiq —End Apr 22, 2026Closed
- Will there be a run scored in the first inning?: Athletics vs. Seattle MarinersVol 1.1KLiq —End Apr 29, 2026Closed
- Spread: Athletics (-1.5)Vol 1.1KLiq —End Apr 22, 2026Closed
- Spread: Athletics (-2.5)Vol 330Liq —End Apr 22, 2026Closed
- Athletics vs. Seattle Mariners: O/U 7.5Vol 26.3KLiq —End Apr 22, 2026Closed
- Athletics vs. Seattle Mariners: O/U 8.5Vol 17.1KLiq —End Apr 22, 2026Closed
- Spread: Seattle Mariners (-1.5)Vol 17.0KLiq —End Apr 22, 2026Closed