TOTAL VOLUME:

$115.8b

24H VOL:

$65,919,658

24H TRANSACTIONS:

1,351,118,393

OPEN INTEREST:

$1,114,324,756

312,055

Markets across

30,503

events

MATCHED EVENTS:

3,322

PLATFORM COVERAGE:

5

Polymarket:

42%

VS.

Kalshi:

58%

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Chicago Cubs vs. Seattle Mariners
Sports
polymarket
kalshi
predict
opinion

Who will win Chicago Cubs vs Seattle Mariners?

Total volume:
$2,801,868
Volume 24h:
$2,583,954
46,118%
Liquidity:
$40,281
89%
Open interest:
$1,122,148
24,696%

Chicago Cubs vs. Seattle Mariners

all

4 markets

Polymarket

100%

Opinion

100%

Predict

99%

Kalshi

0%

consensus

74.8%

-10.8%

spread

0-100%

(100pp)

News

Positive

Negative

Neutral

Hover marker for details

0%20%40%60%80%

Aug 17

Aug 19

Aug 20

Aug 21

Aug 22

Aug 23

Aug 24

Vol.

$2m

·

Resolves Aug 30, 2026

Closed: Aug 23, 7:40 PM EST

polymarket

Polymarket

View
Outcome
Trade
Chance %
Price
Spread
Liquidity
Volume
24h
7d
Open Interest
Ends in
Result

Intro

This market tracks the outcome of the MLB game between the Chicago Cubs and Seattle Mariners, focusing on whether the Chicago Cubs will cover a spread of -7.5 runs. The aggregated consensus probability for the leading outcome, Spread: Chicago Cubs (-7.5), is 100.0% across Polymarket, Kalshi, Predict, and Opinion. The resolution source is Official MLB.com statistics. Watch for the game scheduled for August 23, 2026, as it will determine the market outcome.

PredictionHero - Resolution Divergence Alerts (RDA)

Unified Resolution Criteria (Consistent across platforms)

All platforms share identical resolution logic for determining the winner, handling ties, cancellations, and postponements.Primary resolution logic: Official MLB.com statistics

Core resolution logic:

  • Resolve to the winning team if a team wins the game
  • Resolve 50-50 if the game is canceled with no makeup or ends in a tie
  • Remain open if the game is postponed until completed

Edge cases & clarifications:

  • Postponement: Market remains open until the makeup game is completed
  • Cancellation: Market resolves 50-50 if no makeup game is scheduled
  • Tie: Market resolves 50-50 if the game ends in a tie
Timing: Resolution occurs after official MLB.com statistics are published, with credible reporting used if needed within 24 hours of the eventOur PredictionHero Resolution Divergence Alerts (RDA) are there to help users identify potential differences across platforms. They do not replace or supersede the official rules and description of any prediction market. Users are solely responsible for reviewing and understanding the applicable rules and resolution criteria before placing any trade or bet. If you notice a potential inconsistency, discrepancy, or error in an alert, please report it to our team so we can review and improve the accuracy of our data.
Show more

Polymarket

In the upcoming MLB game between the Chicago Cubs and Seattle Mariners, scheduled for August 23 at 4:10PM ET: This market will resolve to "Chicago Cubs" if the Chicago Cubs 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.

Kalshi

If Chicago C wins the Chicago C vs Seattle professional baseball game originally scheduled for Aug 22, 2026 at 7:15 PM EDT, then the market resolves to Yes. If Seattle wins the Chicago C vs Seattle professional baseball game originally scheduled for Aug 22, 2026 at 7:15 PM EDT, then the market resolves to Yes.

Predict

In the upcoming MLB game between the Chicago Cubs and Seattle Mariners, scheduled for August 23 at 4:10PM ET: This market will resolve to "Chicago Cubs" if the Chicago Cubs 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.

Opinion

In the upcoming MLB game, scheduled for 2026-08-23 20:10 UTC: If the Chicago Cubs win, the market will resolve to "Chicago Cubs". If the Seattle Mariners win, the market will resolve to "Seattle Mariners". The result will be determined based on the final score including any extra innings. 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 officially ends in a tie, this market will resolve 50-50. Resolution Source: https://www.mlb.com/ Note: Opinion will resolve strictly based on the first officially published result from the designated source. Any subsequent revisions will not affect this resolution.

Frequently asked questions

The dashboard for the Cubs vs. Mariners matchup market aggregates data across platforms, showing real-time consensus views and volume trends. It tracks how traders on different venues price this market, highlighting any shifts in expectations for the game’s outcome. By pulling in live updates, the dashboard offers a snapshot of collective sentiment and betting activity, letting users see where interest is concentrated and how it changes over time.

On Polymarket and Opinion, prices can vary because each platform attracts distinct trader bases and liquidity profiles. Polymarket and Opinion can show different implied probabilities for the same outcome because of liquidity, fee structure, participant mix, and how each venue defines the contract. For instance, one venue might see heavier betting from local fans, skewing its odds, while the other could lean on global, data-driven participants. These differences in participation and information flow naturally produce divergent pricing for this market.

This market resolves around Aug 30, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. The final result will reflect the on-field performance in the game, and all platforms will settle based on that verified data.

Injuries, weather delays, and pitcher rotations are key signals that could shift this market before Aug 30, 2026. Any last-minute lineup changes or performance surges may cause traders to re-evaluate probabilities, pushing odds on Polymarket or Opinion in response to new information. Volume often spikes around these updates, reflecting heightened uncertainty or consensus shifts.