TOTAL VOLUME:

$134.2b

24H VOL:

$126,324,530

24H TRANSACTIONS:

2,388,728,490

OPEN INTEREST:

$1,434,646,834

406,019

Markets across

30,401

events

MATCHED EVENTS:

2,689

PLATFORM COVERAGE:

5

Polymarket:

39%

VS.

Kalshi:

61%

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Seattle Mariners vs. Washington Nationals
kalshi
predict
polymarket

Seattle Mariners vs. Washington Nationals

Volume:
$942,621

Spread -1.5

 - Polymarket

Spread -1.5 - Polymarket

1W

News

Positive

Negative

Neutral

Hover marker for details

Vol.

·

Resolved Jun 13, 2026

Closed: Jun 13, 4:05 PM EST

polymarket

Polymarket

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

Spread -1.5

View
100%
Yes 100¢No 0¢
1¢
N/A
$13,943
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 8.5

View
100%
Yes 100¢No 0¢
3¢
N/A
$8,570
N/A
N/A
N/A
Settled
Yes
polymarket

Spread -3.5

View
100%
Yes 100¢No 0¢
1¢
N/A
$4,967
N/A
N/A
N/A
Settled
Yes
polymarket

Spread -2.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$4,209
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 7.5

View
100%
Yes 100¢No 0¢
1¢
N/A
$3,498
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 10.5

View
100%
Yes 100¢No 0¢
1¢
N/A
$2,516
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 9.5

View
100%
Yes 100¢No 0¢
1¢
N/A
$2,222
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 6.5

View
100%
Yes 100¢No 0¢
0.9¢
N/A
$1,479
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 5.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$895
N/A
N/A
N/A
Settled
Yes
polymarket

NRFI

View
100%
Yes 100¢No 0¢
1¢
N/A
$371
N/A
N/A
N/A
Settled
Yes
kalshi

Yes

View
0%
Yes 0¢No 100¢
100¢
N/A
$268,944
N/A
N/A
$184,432
Settled
No
polymarket

1st 5 Innings O/U 3.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$83
N/A
N/A
N/A
Settled
Yes
polymarket

1st 5 Innings O/U 5.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$80
N/A
N/A
N/A
Settled
Yes
polymarket

1st 5 Innings O/U 4.5

View
100%
Yes 100¢No 0¢
0.9¢
N/A
$71
N/A
N/A
N/A
Settled
Yes
polymarket

1st 5 Innings O/U 2.5

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

1st 5 Innings O/U 6.5

View
100%
Yes 100¢No 0¢
1¢
N/A
$20
N/A
N/A
N/A
Settled
Yes
polymarket

1st 5 Innings Spread -1.5

View
100%
Yes 100¢No 0¢
1¢
N/A
$5
N/A
N/A
N/A
Settled
Yes
polymarket

Seattle Mariners vs. Washington Nationals

View
0%
Yes 0¢No 100¢
—
N/A
$615,913
N/A
N/A
N/A
Settled
Yes
predict

Seattle Mariners vs. Washington Nationals

View
N/A
N/A
—
$650
$5,896
N/A
N/A
N/A
Settled
No
polymarket

O/U 11.5

View
0%
Yes 0¢No 100¢
—
N/A
$5,394
N/A
N/A
N/A
Settled
Yes
polymarket

Spread -1.5

View
0%
Yes 0¢No 100¢
—
N/A
$2,143
N/A
N/A
N/A
Settled
Yes
polymarket

Spread -2.5

View
0%
Yes 0¢No 100¢
—
N/A
$1,240
N/A
N/A
N/A
Settled
Yes
polymarket

Spread -3.5

View
0%
Yes 0¢No 100¢
—
N/A
$133
N/A
N/A
N/A
Settled
Yes
polymarket

1st 5 Innings Spread -1.5

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

1st 5 Innings Spread -2.5

View
0%
Yes 0¢No 100¢
—
N/A
$5
N/A
N/A
N/A
Settled
Yes
Total markets: 25 of 28

Description

This event group covers an MLB game between the Seattle Mariners and Washington Nationals scheduled for June 13, 2026 at 4:05 PM ET (with one source citing June 12 at 6:45 PM EDT). Markets track both the game winner and whether a run is scored in the first inning across three prediction platforms.

PredictionHero - Resolution Divergence Alerts (RDA)

Divergence Detected

Issue: Game scheduling conflict: Polymarket and Predict specify June 13 at 4:05 PM ET, while Kalshi specifies June 12 at 6:45 PM EDT. This creates ambiguity about which game is being referenced and makes cross-platform settlement impossible without clarification.Hero tip: Before trading, confirm the official game date and time on MLB.com. If the dates differ, these may be separate games or one platform contains an error. Resolve this ambiguity with the platforms' support teams before committing capital.

Critical divergence points:

  • Polymarket: Game scheduled June 13 at 4:05 PM ET. Winner market and first-inning run market both reference this date. Resolution source: official MLB final statistics or credible reporting consensus within 24 hours. Quote: 'scheduled for June 13 at 4:05 PM ET'.
  • Predict: Game scheduled June 13 at 4:05 PM ET. Winner market references this date. Resolution source: official MLB final statistics or credible reporting consensus within 24 hours. Quote: 'scheduled for June 13 at 4:05PM ET'.
  • Kalshi: Game scheduled June 12 at 6:45 PM EDT. First-inning run market references this earlier date. Quote: 'originally scheduled for Jun 12, 2026 at 6:45 PM EDT'.
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 Seattle Mariners and Washington Nationals, scheduled for June 13 at 4:05PM ET: This market will resolve to "Seattle Mariners" if the Seattle Mariners win the game. This market will resolve to "Washington Nationals" if the Washington Nationals 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 either team scores a run in the first inning of the Seattle vs Washington professional baseball game originally scheduled for Jun 12, 2026 at 6:45 PM EDT, then the market resolves to Yes.

Predict

In the upcoming MLB game between the Seattle Mariners and Washington Nationals, scheduled for June 13 at 4:05PM ET: This market will resolve to "Seattle Mariners" if the Seattle Mariners win the game. This market will resolve to "Washington Nationals" if the Washington Nationals 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

The Seattle Mariners vs. Washington Nationals dashboard aggregates real-time odds and trading activity across Polymarket and Kalshi, tracking the same underlying event across multiple prediction markets. You can monitor consensus probability shifts, compare how each platform prices the matchup, and view cumulative trading volume to gauge market conviction. This multi-platform view reveals whether traders across different venues agree on the likely outcome or if meaningful divergence exists, helping you identify arbitrage opportunities or consensus strength before the game begins.

Prediction market odds on Polymarket and Kalshi reflect real-time trader consensus and can differ significantly from traditional sportsbook lines. Sportsbooks adjust for sharp money and liability management, while prediction markets aggregate decentralized participant beliefs. For the Seattle Mariners vs. Washington Nationals matchup, comparing these sources helps identify where public perception diverges from professional oddsmakers. Prediction markets often react faster to breaking news like injury reports or lineup changes, making them a valuable cross-check against static sportsbook pricing.

Key catalysts for the Seattle Mariners vs. Washington Nationals market include last-minute roster changes, starting pitcher confirmations, weather updates affecting ballpark conditions, and injury announcements to star players. Betting line movement at major sportsbooks often precedes prediction market shifts, signaling sharp money entering the market. Pregame news conferences, lineup announcements, and bullpen availability reports can trigger rapid repricing. Social media sentiment and expert commentary may also influence retail trader behavior. Monitor team official channels and sports news outlets in the hours before first pitch for developments that could shift consensus odds on Polymarket and Kalshi.