TOTAL VOLUME:

$134.1b

24H VOL:

$113,466,932

24H TRANSACTIONS:

2,388,728,490

OPEN INTEREST:

$1,423,222,590

402,751

Markets across

30,217

events

MATCHED EVENTS:

2,632

PLATFORM COVERAGE:

5

Polymarket:

39%

VS.

Kalshi:

61%

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Seattle Mariners vs. Athletics
polymarket

Who will win Seattle Mariners vs Athletics?

Volume:
$593,362

O/U 9.5

 - Polymarket

O/U 9.5 - Polymarket

1W

News

Positive

Negative

Neutral

Hover marker for details

Vol.

·

Resolved Sep 13, 2026

Closed: Sep 12, 11:23 PM EST

polymarket

Polymarket

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

O/U 9.5

View
100%
50%
Yes 100¢No 0¢
0.1¢
N/A
$384,655
N/A
N/A
N/A
Settled
Yes
polymarket

Seattle Mariners vs. Athletics

View
100%
39%
Yes 100¢No 0¢
0.1¢
N/A
$105,239
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 10.5

View
100%
57%
Yes 100¢No 0¢
0.1¢
N/A
$21,521
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 15.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$15,048
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 8.5

View
100%
40%
Yes 100¢No 0¢
0.1¢
N/A
$10,576
N/A
N/A
N/A
Settled
Yes
polymarket

Spread -1.5

View
100%
50%
Yes 100¢No 0¢
0.1¢
N/A
$9,567
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 13.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$8,292
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 11.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$7,253
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 12.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$5,658
N/A
N/A
N/A
Settled
Yes
polymarket

Spread -2.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$4,917
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 14.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$3,965
N/A
N/A
N/A
Settled
Yes
polymarket

NRFI

View
100%
50%
Yes 100¢No 0¢
0.1¢
N/A
$3,419
N/A
N/A
N/A
Settled
Yes
polymarket

1st 5 Innings O/U 5.5

View
100%
56%
Yes 100¢No 0¢
0.1¢
N/A
$690
N/A
N/A
N/A
Settled
Yes
polymarket

Spread -6.5

View
100%
Yes 100¢No 0¢
0.5¢
N/A
$412
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 19.5

View
100%
Yes 100¢No 0¢
0.8¢
N/A
$245
N/A
N/A
N/A
Settled
Yes
polymarket

Spread -3.5

View
100%
Yes 100¢No 0¢
0.4¢
N/A
$182
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 17.5

View
100%
Yes 100¢No 0¢
0.8¢
N/A
$62
N/A
N/A
N/A
Settled
Yes
polymarket

1st 5 Innings O/U 2.5

View
100%
19%
Yes 100¢No 0¢
1¢
N/A
$32
N/A
N/A
N/A
Settled
Yes
polymarket

Spread -9.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$12
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 16.5

View
100%
Yes 100¢No 0¢
0.7¢
N/A
$12
N/A
N/A
N/A
Settled
Yes
polymarket

Spread -4.5

View
100%
Yes 100¢No 0¢
0.6¢
N/A
$12
N/A
N/A
N/A
Settled
Yes
polymarket

Spread -8.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$12
N/A
N/A
N/A
Settled
Yes
polymarket

1st 5 Innings Spread -1.5

View
100%
55%
Yes 100¢No 0¢
0.1¢
N/A
$5
N/A
N/A
N/A
Settled
Yes
polymarket

1st 5 Innings O/U 4.5

View
100%
43%
Yes 100¢No 0¢
1¢
N/A
$4
N/A
N/A
N/A
Settled
Yes
polymarket

Spread -1.5

View
0%
Yes 0¢No 100¢
—
N/A
$10,341
N/A
N/A
N/A
Settled
Yes
Total markets: 25 of 37

Intro

This market tracks whether the Seattle Mariners or the Athletics will win their upcoming MLB game on September 12 at 9:40PM ET, with resolution based on the official results from https://www.mlb.com/scores. Currently, the probability of “Seattle Mariners vs. Athletics: O/U 16.5” winning is 99.7%. Keep an eye on the game’s outcome as the market will resolve following the conclusion of the game, with a final resolution date estimate of 2026-09-20.

Polymarket

In the upcoming MLB game between the Seattle Mariners and Athletics, scheduled for September 12 at 9:40PM ET: This market will resolve to "Seattle Mariners" if the Seattle Mariners win the game. This market will resolve to "Athletics" if the Athletics 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.

Frequently asked questions

On Polymarket, the dashboard for the Mariners-Athletics game tracks the current odds, price history, and 24-hour trading volume. You can see how the probabilities for various outcomes have shifted over time, and gauge market interest through the volume of $598,599 traded in the last day. Currently, the total volume for this market is $593,362. The dashboard provides a real-time view of where traders stand on the likely result of this baseball matchup, offering insights into the collective prediction.

Often, prediction market odds reflect a different perspective than traditional sportsbooks. While sportsbooks set lines to balance action and incorporate a profit margin, this market represents the collective wisdom of traders who are incentivized to make accurate predictions. Discrepancies can arise due to differing information sources, risk assessments, or simply the influence of public sentiment. It’s common to see prediction markets move faster than sportsbooks in response to new information, as traders react quickly to any developments impacting the game.

This market resolves around Sep 20, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. The resolution will be based on the official result of the Seattle Mariners versus Athletics game. The final score and any relevant game statistics will be used to determine the winning outcome in this market. Traders will be able to claim their winnings based on the final, verified result of the game.

Several factors could significantly impact this market before resolution. Any news regarding key player injuries, starting pitcher changes, or weather forecasts could cause the odds to shift. Unexpected lineup announcements or reports on team morale could also influence trader behavior. Furthermore, real-time game events, such as early scoring plays or defensive errors, will likely lead to rapid price adjustments as traders react to the unfolding action. Monitoring these signals is crucial for anyone looking to trade in this market.