Kansas City Royals vs. Boston Red Sox

$132.7K Vol
Sep 20, 2026
Active
Probability Trend
Boston Red Sox 90.5%
Kansas City Royals 9.5%

Core Summary

According to the latest prediction market data for the query “Kansas City Royals vs. Boston Red Sox”, traders have formed a strong consensus.

Currently, O/U 5.5 is dominating the market with an overwhelming 7,550% chance of winning. O/U 4.5 follows in second place at 7,500%, while O/U 6.5 sits in third with 7,000%. The betting volume for this specific market has already reached $132.7K, reflecting intense industry interest.

Breakdown of Competitive Tiers

To better assess where each potential outcome stands, the market can be segmented into three distinct trading tiers based on implied probability and contract pricing:

🥇 Tier 1: The Dominant Leader

  • O/U 5.5 (7,550%): Currently commanding the highest probability, O/U 5.5 is heavily favored by the order book. Traders looking to back this outcome face a “Buy Yes” contract price of 7,550¢, signaling a high degree of market conviction.

🥈 Tier 2: The Primary Challengers

  • O/U 4.5 (7,500%): Positioned as the most viable alternative, O/U 4.5 maintains a 7,500% chance of resolving true. Its “Buy Yes” shares currently trade at 7,500¢.
  • O/U 6.5 (7,000%): Sitting in third place with a 7,000% probability, the market shows measured skepticism toward O/U 6.5, treating it as an outside wildcard unless momentum shifts.

🥉 Tier 3: The Long-Tail Options (Combining for ~0%)

Beyond the top three choices, a wide field of macro variables and long-shot outcomes are being tracked. While their individual probabilities hover low, they represent crucial hedges for speculative traders:

  • Alternative Options: This includes Spread -1.5 (6,750%), Extra Innings (5,000%), and Spread -2.5 (3,550%).
  • Speculative Volume: Despite low statistical likelihood, certain long-tail contracts like O/U 7.5 are still attracting notable interest.

Comprehensive Order Book & Pricing Dashboard

The table below outlines the full breakdown of contract prices, probabilities, and market depth for all listed outcomes in this prediction pool:

RankPredicted OutcomeWin ProbabilityTrading VolumeBuy Yes (Cost)Buy No (Cost)
1O/U 5.57550.0%7550¢-7450¢
2O/U 4.57500.0%$77500¢-7400¢
3O/U 6.57000.0%$27000¢-6900¢
4Spread -1.56750.0%$1.4K6750¢-6650¢
5Extra Innings5000.0%$565000¢-4900¢
6Spread -2.53550.0%$1.7K3550¢-3450¢
7O/U 7.52950.0%$1.2K2950¢-2850¢
8O/U 8.52500.0%$47.9K2500¢-2400¢
9O/U 9.51200.0%$3.8K1200¢-1100¢
10Kansas City Royals vs. Boston Red Sox1050.0%$103.6K1050¢-950¢
11Spread -1.5550.0%$1.4K550¢-450¢
12Spread -2.5350.0%$1.7K350¢-250¢
131st 5 Innings Spread -1.550.0%$550¢50¢
141st 5 Innings O/U 2.550.0%50¢50¢
151st 5 Innings O/U 3.550.0%50¢50¢
161st 5 Innings Spread -1.55.0%$595¢
171st 5 Innings O/U 4.55.0%$4195¢
181st 5 Innings O/U 5.55.0%95¢
191st 5 Innings O/U 6.55.0%95¢

Result Rules

In the upcoming MLB game between the Kansas City Royals and Boston Red Sox, scheduled for September 12 at 4:10PM ET:

This market will resolve to "Kansas City Royals" if the Kansas City Royals win the game.

This market will resolve to "Boston Red Sox" if the Boston Red Sox 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.

Trade Activities

Here is the trade activities for this event.

Sep 12, 2026

  • 11:28 AM
    JZjzy0546
    $5.30

    Bought 10.192308 Over for Kansas City Royals vs. Boston Red Sox: O/U 8.5 at 0.52

  • 11:27 AM
    XPxp6666
    $10.00

    Bought 20.408164 Under for Kansas City Royals vs. Boston Red Sox: O/U 8.5 at 0.49

  • 10:56 AM
    ELelep222
    $4.83

    Bought 32.21 Yes for Will the game go to extra innings?: Kansas City Royals vs. Boston Red Sox at 0.15

  • 10:09 AM
    JZjzy0546
    $5.30

    Bought 10.192308 Over for Kansas City Royals vs. Boston Red Sox: O/U 8.5 at 0.52

  • 10:09 AM
    BRbrendoncarson
    $219.50

    Bought 430.39 Over for Kansas City Royals vs. Boston Red Sox: O/U 8.5 at 0.51

  • 10:03 AM
    NANathan0376
    $7.50

    Bought 20.833334 Kansas City Royals for Kansas City Royals vs. Boston Red Sox at 0.36

  • 10:03 AM
    LAlarame
    $4.68

    Bought 13 Kansas City Royals for Kansas City Royals vs. Boston Red Sox at 0.36

  • 10:01 AM
    TETeressa1
    $5.04

    Bought 14 Kansas City Royals for Kansas City Royals vs. Boston Red Sox at 0.36

  • 08:52 AM
    ELelep222
    $13.65

    Bought 34.13 Over for Kansas City Royals vs. Boston Red Sox: O/U 9.5 at 0.4

  • 08:35 AM
    GOGold39
    $10.00

    Bought 16.393443 Under for Kansas City Royals vs. Boston Red Sox: O/U 9.5 at 0.61

  • 08:34 AM
    BRbrendoncarson
    $10.95

    Bought 21.9 Over for Kansas City Royals vs. Boston Red Sox: O/U 8.5 at 0.5

  • 08:13 AM
    ELelep222
    $27.62

    Bought 76.72 Kansas City Royals for Kansas City Royals vs. Boston Red Sox at 0.36

Whales Wallets That Are Betting on This Event

FE1
ferrariChampions2026
Event PnL
+$117.30
Volume
$22,925.10
Positions
Kansas City RoyalsBoston Red Sox
WR2
wr0ngw4yb3tt0r
Event PnL
-$84.23
Volume
$16,845.83
Positions
Boston Red Sox
HO3
HomeRunHazard
Event PnL
+$116.65
Volume
$9,391.55
Positions
Boston Red SoxUnderOver+3
VE4
VeryLucky888
Event PnL
-$71.38
Volume
$8,142.07
Positions
Kansas City RoyalsKansas City Royals
NO5
no1dodgersfan
Event PnL
-$22.83
Volume
$4,565.00
Positions
Boston Red Sox
A66
0xa697…6031
Event PnL
-$0.21
Volume
$3,946.87
Positions
UnderKansas City RoyalsUnder+1
MO7
monkeymashingkeyboard
Event PnL
+$16.92
Volume
$3,380.38
Positions
Boston Red Sox
BR8
brendoncarson
Event PnL
-$38.58
Volume
$3,161.41
Positions
Over

Frequently Asked Questions

What is the current market consensus on "Kansas City Royals vs. Boston Red Sox"?

As of the latest update, O/U 5.5 leads the field as the frontrunner with a 7,550% win probability, followed by O/U 4.5 at 7,500% and O/U 6.5 at 7,000%. Total trading volume for this pool has reached $132.7K, indicating deep liquidity and high trader engagement.

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