TOTAL VOLUME:

$134.2b

24H VOL:

$130,522,377

24H TRANSACTIONS:

2,388,728,490

OPEN INTEREST:

$1,438,389,636

404,028

Markets across

30,214

events

MATCHED EVENTS:

2,681

PLATFORM COVERAGE:

5

Polymarket:

39%

VS.

Kalshi:

61%

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Athletics vs. Kansas City Royals
predict
kalshi
polymarket

Who will win Athletics vs Kansas City Royals?

Volume:
$794,643

O/U 8.5

 - Polymarket

O/U 8.5 - Polymarket

1W

News

Positive

Negative

Neutral

Hover marker for details

Vol.

·

Resolved Aug 20, 2026

Closed: Aug 19, 10:09 PM EST

polymarket

Polymarket

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

O/U 8.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$60,407
N/A
N/A
N/A
Settled
Yes
polymarket

Spread -1.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$41,801
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 7.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$24,333
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 9.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$12,052
N/A
N/A
N/A
Settled
Yes
polymarket

1st 5 Innings O/U 4.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$1,550
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 10.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$492
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 11.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$343
N/A
N/A
N/A
Settled
Yes
polymarket

NRFI

View
100%
49%
Yes 100¢No 0¢
0.1¢
N/A
$271
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
$269
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
$34
N/A
N/A
N/A
Settled
Yes
polymarket

1st 5 Innings O/U 3.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$20
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 14.5

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

1st 5 Innings Spread -1.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$13
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 12.5

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

O/U 13.5

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

Athletics vs. Kansas City Royals

View
1%
Yes 1¢No 99¢
—
$341
$121,110
N/A
N/A
N/A
Settled
No
polymarket

Athletics vs. Kansas City Royals

View
0%
45%
Yes 0¢No 100¢
—
N/A
$504,032
N/A
N/A
N/A
Settled
Yes
polymarket

Spread -2.5

View
0%
Yes 0¢No 100¢
—
N/A
$12,708
N/A
N/A
N/A
Settled
Yes
polymarket

Spread -1.5

View
0%
Yes 0¢No 100¢
—
N/A
$9,122
N/A
N/A
N/A
Settled
Yes
polymarket

Spread -2.5

View
0%
Yes 0¢No 100¢
—
N/A
$4,486
N/A
N/A
N/A
Settled
Yes
kalshi

Game goes to extra innings

View
0%
Yes 0¢No 100¢
100¢
N/A
$1,114
N/A
N/A
$1,084
Settled
No
polymarket

Extra Innings

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

Spread -3.5

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

1st 5 Innings O/U 6.5

View
0%
Yes 0¢No 100¢
—
N/A
$177
N/A
N/A
N/A
Settled
Yes
polymarket

Spread -3.5

View
0%
Yes 0¢No 100¢
—
N/A
$20
N/A
N/A
N/A
Settled
Yes
Total markets: 25 of 28

Intro

This market tracks the outcome of the first five innings spread for the MLB game between the Athletics and the Kansas City Royals, specifically whether the Athletics will win by more than 1.5 runs. The aggregated consensus probability for the Athletics (-1.5) is currently 100%. Data is aggregated from Predict, Kalshi, and Polymarket, with resolution based on official MLB statistics or credible reporting consensus. Watch for the game on August 19 at 7:40 PM ET, as this will determine the market outcome.

PredictionHero - Resolution Divergence Alerts (RDA)

Unified Resolution Criteria (Consistent across platforms)

All platforms use the same core resolution logic tied to official MLB statistics or credible reporting consensus, with identical handling of postponements, cancellations, and ties.Primary resolution logic: Official MLB statistics or credible reporting consensus

Core resolution logic:

  • Winner markets resolve to the team that wins the game per official MLB records
  • First-inning run markets resolve based on whether either team scores in the first inning
  • Postponements keep markets open until the game is completed
  • Cancellations or ties result in 50-50 resolution

Edge cases & clarifications:

  • Postponement: Markets remain open until the makeup game is completed
  • Cancellation: Markets resolve as 50-50 if no makeup game is scheduled
  • Tie: Markets resolve as 50-50 if the game ends in a tie with no continuation
Timing: Resolution occurs after official MLB statistics are published, or within 24 hours of game conclusion if stats are delayedOur 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 Athletics and Kansas City Royals, scheduled for August 19 at 7:40PM ET: This market will resolve to "Athletics" if the Athletics win the game. This market will resolve to "Kansas City Royals" if the Kansas City Royals 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 A's and Kansas City go to extra innings in the A's vs Kansas City professional baseball game originally scheduled for Aug 19, 2026 at 7:40 PM EDT, then the market resolves to Yes.

Predict

In the upcoming MLB game between the Athletics and Kansas City Royals, scheduled for August 19 at 7:40PM ET: This market will resolve to "Athletics" if the Athletics win the game. This market will resolve to "Kansas City Royals" if the Kansas City Royals 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 dashboard for the Athletics vs. Royals matchup market aggregates data across multiple prediction platforms, showing real-time probabilities and volume trends. It displays how Polymarket and Predict price this market, along with overall volume of $794,643 and 24-hour volume of $673,536. This view helps traders compare consensus expectations and spot shifts in sentiment as the game approaches.

Injuries, weather delays, pitcher rotations, and recent team performance trends could shift this market. Key starters being placed on the IL or a sudden rainout could cause rapid re-pricing. Traders should monitor pre-game lineups and live in-game scoring, as each run or pitching change may adjust probabilities until the final out is recorded.