TOTAL VOLUME:

$148.5b

24H VOL:

$251,268,536

24H TRANSACTIONS:

2,817,056,367

OPEN INTEREST:

$1,864,438,999

455,542

Markets across

34,846

events

MATCHED EVENTS:

2,830

PLATFORM COVERAGE:

5

Polymarket:

38%

VS.

Kalshi:

62%

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MLB: 2026 American League Champion
polymarket
kalshi

MLB: 2026 American League Champion

Volume:
$16,500,017

Tampa Bay

all

2 markets

Kalshi

Polymarket

consensus

News

Positive

Negative

Neutral

Hover marker for details

Vol.

·

Resolved Oct 20, 2026

Closed: Oct 19, 11:09 PM EST

kalshi

Kalshi

View
Join Kalshi and score $25 for your first trade.
Outcome
Trade
Chance %
Price
Spread
Liquidity
Volume
24h
7d
Open Interest
Ends in
Result
kalshi

Tampa Bay

View
100%
20%
Yes 100¢No 0¢
—
N/A
$2,900,493
N/A
N/A
$1,264,049
1w
Yes
polymarket

Tampa Bay Rays

View
100%
21%
Yes 100¢No 0¢
—
N/A
$573,276
N/A
N/A
N/A
1mo 1w
Yes
kalshi

New York Y

View
0%
Yes 0¢No 100¢
—
N/A
$1,942,153
N/A
N/A
$832,126
1w
No
polymarket

New York Yankees

View
0%
Yes 0¢No 100¢
—
N/A
$122,315
N/A
N/A
N/A
1mo 1w
No
kalshi

Cleveland

View
0%
22%
Yes 0¢No 100¢
—
N/A
$1,360,080
N/A
N/A
$716,591
1w
No
polymarket

Cleveland Guardians

View
0%
21%
Yes 0¢No 100¢
—
N/A
$915,488
N/A
N/A
N/A
1mo 1w
No
kalshi

Boston

View
0%
6%
Yes 0¢No 100¢
—
N/A
$1,071,584
N/A
N/A
$613,377
1w
No
polymarket

Boston Red Sox

View
0%
5%
Yes 0¢No 100¢
—
N/A
$85,117
N/A
N/A
N/A
1mo 1w
No
kalshi

Chicago WS

View
0%
16%
Yes 0¢No 100¢
—
N/A
$981,980
N/A
N/A
$617,951
1w
No
polymarket

Chicago White Sox

View
0%
15%
Yes 0¢No 100¢
—
N/A
$351,848
N/A
N/A
N/A
1mo 1w
No
polymarket

Kansas City Royals

View
0%
Yes 0¢No 100¢
—
N/A
$856,311
N/A
N/A
N/A
1mo 1w
No
kalshi

Kansas City

View
0%
Yes 0¢No 100¢
—
N/A
$127,826
N/A
N/A
$107,449
1w
No
polymarket

Houston Astros

View
0%
5%
Yes 0¢No 100¢
—
N/A
$802,885
N/A
N/A
N/A
1mo 1w
No
kalshi

Houston

View
0%
5%
Yes 0¢No 100¢
—
N/A
$607,598
N/A
N/A
$341,716
1w
No
kalshi

Seattle

View
0%
1%
Yes 0¢No 100¢
—
N/A
$697,841
N/A
N/A
$392,042
1w
No
polymarket

Seattle Mariners

View
0%
Yes 0¢No 100¢
—
N/A
$43,939
N/A
N/A
N/A
1mo 1w
No
kalshi

Detroit

View
0%
Yes 0¢No 100¢
—
N/A
$544,447
N/A
N/A
$295,703
1w
No
polymarket

Detroit Tigers

View
0%
Yes 0¢No 100¢
—
N/A
$126,598
N/A
N/A
N/A
1mo 1w
No
kalshi

Texas

View
0%
4%
Yes 0¢No 100¢
—
N/A
$379,791
N/A
N/A
$244,168
1w
No
polymarket

Texas Rangers

View
0%
1%
Yes 0¢No 100¢
—
N/A
$34,792
N/A
N/A
N/A
1mo 1w
No
polymarket

Los Angeles Angels

View
0%
Yes 0¢No 100¢
—
N/A
$327,455
N/A
N/A
N/A
1mo 1w
No
kalshi

Los Angeles A

View
0%
Yes 0¢No 100¢
—
N/A
$104,961
N/A
N/A
$87,063
1w
No
kalshi

Baltimore

View
0%
1%
Yes 0¢No 100¢
—
N/A
$291,635
N/A
N/A
$162,704
1w
No
polymarket

Baltimore Orioles

View
0%
Yes 0¢No 100¢
—
N/A
$73,056
N/A
N/A
N/A
1mo 1w
No
kalshi

Toronto

View
0%
Yes 0¢No 100¢
—
N/A
$283,486
N/A
N/A
$193,187
1w
No
Total markets: 25 of 31

Description

These markets resolve based on which team wins the 2026 Major League Baseball American League Championship Series (ALCS). The ALCS is the final playoff series in the AL, determining which team advances to the World Series. Exactly one AL team will win this series, and these markets collectively cover all 15 current AL franchises plus a catch-all for any hypothetical expansion or relocation scenarios.

PredictionHero - Resolution Divergence Alerts (RDA)

Unified Resolution Criteria (Consistent across platforms)

Both Kalshi and Polymarket resolve identically: YES if and only if the named team wins the 2026 American League Championship Series, with exactly one market in the group resolving YES. Both platforms use official MLB sources as the primary resolution authority.Primary resolution logic: Official Major League Baseball (MLB) records and announcements at mlb.com

Core resolution logic:

  • Market resolves YES if and only if the named team wins the 2026 American League Championship Series.
  • Market resolves NO if the named team does not win the series or is eliminated before the ALCS.
  • Exactly ONE market in the group will resolve YES (one AL team must win the championship).
  • Resolution is based on the official winner declared by MLB within the 2026 season timeframe.
Timing: Resolution occurs upon official MLB announcement of the 2026 American League Championship Series winner, on or before November 31, 2026, 11:59 PM ET.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

This market will resolve according to the team that wins the 2026 American League Championship Series. If at any point it becomes impossible for a listed team to win the 2026 American League Championship Series per the rules of the MLB (e.g., they are eliminated in the playoffs), the corresponding market will resolve to “No”. If the 2026 American League Championship Series is cancelled, postponed after November 30, 2026, 11:59 PM ET, or there is otherwise no winner declared within that timeframe, this market will resolve to “Other”. The primary resolution source will be official information from Major League Baseball (https://www.mlb.com/); however, a consensus of credible reporting may also be used.

Kalshi

The 2026 American League Champion is determined through postseason competition. Any team from the American League may win the championship by advancing through the playoff structure and winning the American League Championship Series. The market resolves to Yes for whichever team ultimately claims the American League title and earns the right to compete in the World Series.

Frequently asked questions

Prices on Polymarket and Kalshi can diverge due to several factors. Polymarket and Kalshi can show different implied probabilities for the same outcome because of liquidity, fee structure, participant mix, and how each venue defines the contract. Each platform has a different user base, trading limits, and fee structure, which can influence price discovery. Additionally, differing levels of liquidity and information flow can lead to discrepancies. For example, if a significant piece of news breaks and is quickly incorporated into prices on one platform but not the other, you'll see a temporary difference. These price variations create arbitrage opportunities for traders who can capitalize on the discrepancies across venues.

Numerous events could significantly impact this market. Major player injuries, trades, or changes in team management are all potential catalysts. Unexpected performance from teams during the regular season, particularly strong or weak showings from contenders, will also influence prices. News regarding rule changes or potential labor disputes within MLB could create volatility. Additionally, any significant developments affecting the overall health of the league or the competitive landscape could shift predictions, making this market dynamic until its resolution.