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MLB 2026: World Series Winning League odds

Polymarket traders put the chance of American League at 17% and National League at 84% for “MLB 2026: World Series Winning League” (American League −9.5 pts in the last 24 hours).

Prices refresh every few minutes. Probabilities are not predictions or advice, and you can lose what you trade.

Chance of American League over the last 30 days

Price of a American League share.

Sep 30Oct 25

American League and National League odds

Probability is the share price. Decimal odds show what $1 returns if that outcome wins, before fees. American odds show the same price as a moneyline: +150 pays $150 on a $100 stake, −200 needs $200 to win $100.

Odds as of

Where this market stands

“MLB 2026: World Series Winning League” is a Polymarket market with two outcomes. American League is priced at 17% and National League at 84%; American League is down 9.5 points over the last 24 hours and down 21 points over the past week. Traders have put $5,822 through the market so far, including $312 in the last 24 hours, and it is scheduled to end on November 16, 2026.

Whale trades in this market

The latest trades of $1,000 or more on this event, newest first.

All whale trades

No trades of $1,000 or more on this market recently.

How this market resolves

This market will resolve to "American League" if a team from the American League wins the 2026 World Series. This market will resolve to "National League" if a team from the National League wins the 2026 World Series.

If the 2026 World Series is cancelled, postponed after November 15, 2026, 11:59 PM ET, or there is otherwise no winner declared within that timeframe, this market will resolve to 50-50.

The primary resolution source will be official information from MLB (https://www.mlb.com/); however, a consensus of credible reporting may also be used.

Rules are written by Polymarket and shown as published. WhaleSays does not settle markets.

Common questions

New to this? Our guide covers how to make your first trade.

What are the odds on MLB 2026: World Series Winning League?
Polymarket currently prices American League at 17% (decimal odds 6.06, American +506) and National League at 84% (decimal odds 1.20, American −506). Each price is the market's implied probability for that outcome.
When does this market close?
The listed end date is November 16, 2026. Read the resolution rules on this page to see what counts and who decides.