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406,019

Markets across

30,401

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MATCHED EVENTS:

2,689

PLATFORM COVERAGE:

5

Polymarket:

39%

VS.

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Houston Astros vs. Seattle Mariners
polymarket
predict

Who will win Houston Astros vs Seattle Mariners?

Volume:
$728,285

Houston Astros vs. Seattle Mariners

all

2 markets

Polymarket

Predict

consensus

News

Positive

Negative

Neutral

Hover marker for details

Vol.

·

Resolved Sep 23, 2026

Closed: Sep 23, 1:04 AM EST

polymarket

Polymarket

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

Houston Astros vs. Seattle Mariners

View
100%
57%
Yes 100¢No 0.1¢
0.1¢
N/A
$329,798
N/A
N/A
N/A
3h 21m
Yes
predict

Houston Astros vs. Seattle Mariners

View
99%
56%
Yes 99¢No 1¢
—
$15,845
$63,041
N/A
N/A
N/A
Settled
No
polymarket

Spread -1.5

View
100%
69%
Yes 100¢No 0.1¢
0.1¢
N/A
$12,920
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 6.5

View
100%
38%
Yes 100¢No 0.1¢
0.1¢
N/A
$9,186
N/A
N/A
N/A
Settled
Yes
polymarket

1st 5 Innings O/U 3.5

View
100%
40%
Yes 100¢No 0.1¢
0.1¢
N/A
$6,958
N/A
N/A
N/A
Settled
Yes
polymarket

Spread -2.5

View
100%
78%
Yes 100¢No 0.1¢
0.1¢
N/A
$2,696
N/A
N/A
N/A
Settled
Yes
polymarket

Spread -4.5

View
100%
Yes 100¢No 0.1¢
0.1¢
N/A
$1,892
N/A
N/A
N/A
Settled
Yes
polymarket

Spread -3.5

View
100%
Yes 100¢No 0.1¢
0.1¢
N/A
$1,558
N/A
N/A
N/A
Settled
Yes
polymarket

NRFI

View
100%
Yes 100¢No 0.1¢
0.1¢
N/A
$1,003
N/A
N/A
N/A
3h 21m
Yes
polymarket

Spread -5.5

View
100%
Yes 100¢No 0.1¢
0.1¢
N/A
$493
N/A
N/A
N/A
Settled
Yes
polymarket

Spread -6.5

View
100%
Yes 100¢No 0.1¢
0.1¢
N/A
$10
N/A
N/A
N/A
Settled
Yes
polymarket

1st 5 Innings Spread -1.5

View
100%
78%
Yes 100¢No 0.8¢
0.8¢
N/A
$175
N/A
N/A
N/A
Settled
Yes
polymarket

1st 5 Innings O/U 4.5

View
1%
Yes 0.9¢No 99.9¢
0.8¢
N/A
$288
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 7.5

View
0%
Yes 0.1¢No 100¢
—
N/A
$261,525
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 8.5

View
0%
42%
Yes 0.1¢No 100¢
—
N/A
$21,073
N/A
N/A
N/A
Settled
Yes
polymarket

Spread -1.5

View
0%
39%
Yes 0.1¢No 100¢
—
N/A
$14,515
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 9.5

View
0%
Yes 0.1¢No 100¢
—
N/A
$890
N/A
N/A
N/A
Settled
Yes
polymarket

Spread -2.5

View
0%
28%
Yes 0.1¢No 100¢
—
N/A
$107
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 10.5

View
0%
Yes 0.1¢No 100¢
—
N/A
$97
N/A
N/A
N/A
Settled
Yes
polymarket

1st 5 Innings O/U 6.5

View
0%
23%
Yes 1¢No 100¢
—
N/A
$60
N/A
N/A
N/A
Settled
Yes
polymarket

1st 5 Innings Spread -1.5

View
0%
34%
Yes 0.7¢No 100¢
—
N/A
N/A
N/A
N/A
N/A
Settled
Yes
polymarket

1st 5 Innings O/U 2.5

View
100%
27%
Yes 100¢No 0.5¢
0.5¢
N/A
N/A
N/A
N/A
N/A
Settled
Yes
polymarket

1st 5 Innings O/U 5.5

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

Extra Innings

View
0%
10%
Yes 0.1¢No 100¢
—
N/A
N/A
N/A
N/A
N/A
Settled
No
polymarket

Houston Astros O/U 1.5

View
100%
2%
Yes 100¢No 0.5¢
0.5¢
N/A
N/A
N/A
N/A
N/A
Settled
Yes
Total markets: 25 of 34

Intro

This market tracks the spread for the Houston Astros versus the Seattle Mariners baseball game. Currently, the consensus probability that the Houston Astros will win by a spread of -5.5 runs is 100.0%, with an identical 100.0% probability for a spread of -6.5 runs. This aggregate view combines data from Polymarket and Predict, and will resolve based on official MLB statistics from mlb.com. Keep an eye on the outcome of the game on September 22nd, as this will determine the final result of these spread markets.

PredictionHero - Resolution Divergence Alerts (RDA)

Unified Resolution Criteria (Consistent across platforms)

All platforms utilize the same resolution source (MLB.com) and consistently define resolution criteria for postponements, cancellations, and ties.Primary resolution logic: Official MLB statistics (mlb.com)

Core resolution logic:

  • Resolution is based on official MLB statistics.
  • Postponed games remain open until completed.
  • Canceled games or ties resolve 50-50.
  • Markets relating to run totals and spreads are determined by the final score.

Edge cases & clarifications:

  • Truncated Game: If a game is truncated but a final result is awarded, markets will resolve based on the official score as determined by MLB.
  • Reporting Delay: If official MLB statistics are not published within 24 hours, a consensus of credible reporting will be used.
Timing: Resolution will occur after the official completion of the game, with a maximum delay of 24 hours for official statistics to be published.Our 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.

Polymarket

In the upcoming MLB game between the Houston Astros and Seattle Mariners, scheduled for September 22 at 9:40PM ET: This market will resolve to "Houston Astros" if the Houston Astros 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.

Predict

In the upcoming MLB game between the Houston Astros and Seattle Mariners, scheduled for September 22 at 9:40PM ET: This market will resolve to "Houston Astros" if the Houston Astros 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.

Frequently asked questions

On PredictionHero, this dashboard aggregates forecasts for the Astros-Mariners game from multiple prediction markets, including Polymarket and Predict. It provides a consensus view of the likely outcome, reflecting the combined volume of $728,285 and 24-hour volume of $722,421. Currently, Polymarket currently favors Will there be a run scored in the first inning?: Houston Astros vs. Seattle Mariners at 45, while Predict leans toward Houston Astros vs. Seattle Mariners. By tracking these markets together, we offer a more robust and informed prediction than any single platform could provide.

Prediction market odds often differ from traditional sportsbook odds due to the nature of how they are determined. Sportsbooks set lines based on statistical models and expert analysis, while this market relies on the collective intelligence of traders. This dynamic can lead to discrepancies, especially as new information emerges or public sentiment shifts. Prediction markets also typically have lower transaction costs than sportsbooks, potentially influencing price discovery. Both can be valuable tools for assessing probabilities, but they approach the task from different angles.

Polymarket and Predict can show different implied probabilities for the same outcome because of liquidity, fee structure, participant mix, and how each venue defines the contract. Prices on Polymarket and Predict for the Astros-Mariners game can diverge due to differing user bases, trading activity, and market-specific rules. Polymarket may attract a different type of trader than Predict, leading to variations in how information is interpreted and reflected in the odds. Furthermore, the liquidity and volume on each platform can influence price discovery, causing discrepancies even when both markets address the same underlying event. These factors contribute to a dynamic and potentially varied view of the game's outcome across different venues.

Several factors could influence the price of this market before resolution. Any news regarding injuries to key players on either the Astros or the Mariners would likely have a significant impact. Changes in weather forecasts, particularly if they affect playing conditions, could also shift probabilities. Unexpected lineup announcements or strategic decisions made by the managers could also move the market. Finally, general public sentiment and late-breaking news coverage surrounding the game could contribute to price fluctuations.