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

12.7K

24h volume

12.6K

1w volume

12.7K

Open interest

11.3K

Liquidity

360.8K

Liquidity CLOB

360.8K

Start

Apr 15, 2026

End

Apr 29, 2026

Status

Active

Access

Restricted

Created

Apr 22, 2026

Resolution source

https://www.mlb.com/

Event ID

381959

Slug

mlb-oak-sea-2026-04-21

Markets

2

Tags

SportsGamesMLBbaseball
Raw event data
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  "ticker": "mlb-oak-sea-2026-04-21",
  "slug": "mlb-oak-sea-2026-04-21",
  "title": "Athletics vs. Seattle Mariners",
  "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.",
  "resolutionSource": "https://www.mlb.com/",
  "startDate": "2026-04-15T23:27:25.128059Z",
  "creationDate": "2026-04-22T01:40:00Z",
  "endDate": "2026-04-29T01:40:00Z",
  "image": "https://polymarket-upload.s3.us-east-2.amazonaws.com/Repetitive-markets/MLB.jpg",
  "icon": "https://polymarket-upload.s3.us-east-2.amazonaws.com/Repetitive-markets/MLB.jpg",
  "active": true,
  "closed": false,
  "archived": false,
  "new": false,
  "featured": false,
  "restricted": true,
  "liquidity": 360844.9012,
  "volume": 12704.228555000003,
  "openInterest": 11333.917792,
  "createdAt": "2026-04-15T13:00:28.516864Z",
  "updatedAt": "2026-04-21T13:05:04.649464Z",
  "competitive": 0.9999000099990001,
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  "volume1mo": 12704.228555000002,
  "volume1yr": 12704.228555000002,
  "enableOrderBook": true,
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  "negRisk": false,
  "commentCount": 0,
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      "resolutionSource": "https://www.mlb.com/",
      "endDate": "2026-04-29T01:40:00Z",
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      "icon": "https://polymarket-upload.s3.us-east-2.amazonaws.com/Repetitive-markets/MLB.jpg",
      "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.",
      "outcomes": "[\"Athletics\", \"Seattle Mariners\"]",
      "outcomePrices": "[\"0.395\", \"0.605\"]",
      "volume": "11842.397900000004",
      "active": true,
      "closed": false,
      "marketMakerAddress": "",
      "createdAt": "2026-04-15T13:00:28.623167Z",
      "updatedAt": "2026-04-21T13:07:06.985386Z",
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      "volume1mo": 11842.397900000002,
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      "gameStartTime": "2026-04-22 01:40:00+00",
      "secondsDelay": 1,
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      "negRisk": false,
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      "ready": false,
      "funded": false,
      "acceptingOrdersTimestamp": "2026-04-15T23:21:18Z",
      "cyom": false,
      "competitive": 0.9890952251428006,
      "pagerDutyNotificationEnabled": false,
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      "clobRewards": [
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          "rewardsDailyRate": 233,
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      "rewardsMinSize": 1000,
      "rewardsMaxSpread": 2.5,
      "spread": 0.01,
      "oneDayPriceChange": -0.04,
      "oneHourPriceChange": 0.005,
      "lastTradePrice": 0.4,
      "bestBid": 0.39,
      "bestAsk": 0.4,
      "automaticallyActive": true,
      "clearBookOnStart": true,
      "manualActivation": false,
      "negRiskOther": false,
      "sportsMarketType": "moneyline",
      "umaResolutionStatuses": "[]",
      "pendingDeployment": false,
      "deploying": false,
      "deployingTimestamp": "2026-04-15T20:19:16.73322Z",
      "rfqEnabled": false,
      "holdingRewardsEnabled": false,
      "feesEnabled": true,
      "requiresTranslation": false,
      "feeType": "sports_fees_v2",
      "feeSchedule": {
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    },
    {
      "id": "1991496",
      "question": "Will there be a run scored in the first inning?: Athletics vs. Seattle Mariners",
      "conditionId": "0xaff8ca0868f354bf33f8898f795d7729b8e5c99590076ae3df6f40756960fb7d",
      "slug": "mlb-oak-sea-2026-04-21-nrfi",
      "resolutionSource": "https://www.mlb.com/scores",
      "endDate": "2026-04-29T01:40:00Z",
      "liquidity": "2112.8022",
      "startDate": "2026-04-15T22:18:01.990015Z",
      "image": "https://polymarket-upload.s3.us-east-2.amazonaws.com/Repetitive-markets/MLB.jpg",
      "icon": "https://polymarket-upload.s3.us-east-2.amazonaws.com/Repetitive-markets/MLB.jpg",
      "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.",
      "outcomes": "[\"Yes\", \"No\"]",
      "outcomePrices": "[\"0.49\", \"0.51\"]",
      "volume": "861.830655",
      "active": true,
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      "createdAt": "2026-04-15T13:00:28.740845Z",
      "updatedAt": "2026-04-21T13:07:30.993981Z",
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      "acceptingOrders": true,
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      "acceptingOrdersTimestamp": "2026-04-15T22:16:58Z",
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      "spread": 0.02,
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      "bestBid": 0.48,
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      "automaticallyActive": true,
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      "sportsMarketType": "nrfi",
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      "ticker": "mlb",
      "slug": "mlb",
      "title": "MLB",
      "seriesType": "single",
      "recurrence": "daily",
      "image": "https://polymarket-upload.s3.us-east-2.amazonaws.com/Repetitive-markets/MLB.jpg",
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      "label": "Sports",
      "slug": "sports",
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      "publishedAt": "2023-10-24 22:37:50.296+00",
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      "updatedAt": "2026-03-09T22:28:03.358133Z",
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  "showAllOutcomes": true,
  "showMarketImages": false,
  "enableNegRisk": false,
  "automaticallyActive": true,
  "eventDate": "2026-04-21",
  "startTime": "2026-04-22T01:40:00Z",
  "eventWeek": 4,
  "seriesSlug": "mlb",
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  "teams": [
    {
      "id": 114222,
      "name": "Athletics",
      "league": "mlb",
      "record": "12-11",
      "logo": "https://polymarket-upload.s3.us-east-2.amazonaws.com/Athletics-ac2cacdc18.png",
      "abbreviation": "oak",
      "alias": "Athletics",
      "createdAt": "2025-03-31T18:20:34.051129Z",
      "updatedAt": "2026-03-21T01:26:00.270646Z",
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      "logo": "https://polymarket-upload.s3.us-east-2.amazonaws.com/Seattle Mariners-af6bcbe9a0.png",
      "abbreviation": "sea",
      "alias": "Mariners",
      "createdAt": "2025-03-31T18:20:34.051129Z",
      "updatedAt": "2026-03-27T09:00:01.961211Z",
      "providerId": 13,
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