The Prediction Markets

Pro Baseball World Series Champion 2026

Closes
Oct 31, 2026, in 7 days
Traded
$9.2M
Venues
Polymarket, Kalshi
Prices updated
just now
Share

What the markets expect

Milwaukee Brewers 74.1%

Next is Tampa Bay Rays at 26.4%. The venues list this event, but none of their outcomes are matched yet, so prices are shown separately.

Odds by venue

Consensus blends each venue’s last price, weighted by how much has traded there. Best Yes price is the cheapest ask across venues, and the payout is what a winning $100 stake returns before fees. Open a row for each venue’s contract name, bid and ask, and how closely their rules match.

1 of 42 prices are live from the exchange feeds; the rest come from our regular price polls. Ages are as of when this page was built.

  • Polymarket
  • Kalshi
Milwaukee Brewers
74.1%
Polymarket 74.1%live, just nowBest Yes 74.6¢ on Polymarket, $100 pays $134 (1.34x)
Polymarket
Contract
Milwaukee Brewers
Price
74.1%
As of
Live feed, just now
Buy Yes
74.6¢
Sell Yes
73.6¢
$100 on Yes pays
$134 (1.34x)
Volume
$1.1M
Trade this on Polymarket
Tampa Bay Rays
26.4%
Polymarket 26.4%polled, 57s agoBest Yes 27¢ on Polymarket, $100 pays $370 (3.70x)
Polymarket
Contract
Tampa Bay Rays
Last price
26.4%
As of
Polled just now
Buy Yes
27¢
Sell Yes
25.8¢
$100 on Yes pays
$370 (3.70x)
Volume
$148K
Trade this on Polymarket
William Contreras
21%
Kalshi 21%polled, 57s agoBest Yes 22¢ on Kalshi, $100 pays $455 (4.55x)
Kalshi
Contract
William Contreras
Last price
21%
As of
Polled just now
Buy Yes
22¢
Sell Yes
19¢
$100 on Yes pays
$455 (4.55x)
Volume
$140K
Trade this on Kalshi
Jackson Chourio
17%
Kalshi 17%polled, 57s agoBest Yes 19¢ on Kalshi, $100 pays $526 (5.26x)
Kalshi
Contract
Jackson Chourio
Last price
17%
As of
Polled just now
Buy Yes
19¢
Sell Yes
17¢
$100 on Yes pays
$526 (5.26x)
Volume
$129K
Trade this on Kalshi
Junior Caminero
8.6%
Kalshi 8.6%polled, 57s agoBest Yes 8.6¢ on Kalshi, $100 pays $1,163 (11.6x)
Kalshi
Contract
Junior Caminero
Last price
8.6%
As of
Polled just now
Buy Yes
8.6¢
Sell Yes
7.5¢
$100 on Yes pays
$1,163 (11.6x)
Volume
$96K
Trade this on Kalshi
Jake Bauers
7.9%
Kalshi 7.9%polled, 57s agoBest Yes 7.9¢ on Kalshi, $100 pays $1,266 (12.7x)
Kalshi
Contract
Jake Bauers
Last price
7.9%
As of
Polled just now
Buy Yes
7.9¢
Sell Yes
7.8¢
$100 on Yes pays
$1,266 (12.7x)
Volume
$69K
Trade this on Kalshi
Christian Yelich
7%
Kalshi 7%polled, 57s agoBest Yes 7¢ on Kalshi, $100 pays $1,429 (14.3x)
Kalshi
Contract
Christian Yelich
Last price
7%
As of
Polled just now
Buy Yes
7¢
Sell Yes
5.2¢
$100 on Yes pays
$1,429 (14.3x)
Volume
$119K
Trade this on Kalshi
Brice Turang
6.6%
Kalshi 6.6%polled, 57s agoBest Yes 6.6¢ on Kalshi, $100 pays $1,515 (15.2x)
Kalshi
Contract
Brice Turang
Last price
6.6%
As of
Polled just now
Buy Yes
6.6¢
Sell Yes
6.5¢
$100 on Yes pays
$1,515 (15.2x)
Volume
$61K
Trade this on Kalshi
Jonathan Aranda
4.5%
Kalshi 4.5%polled, 57s agoBest Yes 4.7¢ on Kalshi, $100 pays $2,128 (21.3x)
Kalshi
Contract
Jonathan Aranda
Last price
4.5%
As of
Polled just now
Buy Yes
4.7¢
Sell Yes
4¢
$100 on Yes pays
$2,128 (21.3x)
Volume
$89K
Trade this on Kalshi
Aaron Ashby
3.5%
Kalshi 3.5%polled, 57s agoBest Yes 3.5¢ on Kalshi, $100 pays $2,857 (28.6x)
Kalshi
Contract
Aaron Ashby
Last price
3.5%
As of
Polled just now
Buy Yes
3.5¢
Sell Yes
3.4¢
$100 on Yes pays
$2,857 (28.6x)
Volume
$120K
Trade this on Kalshi
Show 32 more outcomes
Drew Rasmussen
3.5%
Kalshi 3.5%polled, 57s agoBest Yes 3.5¢ on Kalshi, $100 pays $2,857 (28.6x)
Kalshi
Contract
Drew Rasmussen
Last price
3.5%
As of
Polled just now
Buy Yes
3.5¢
Sell Yes
3.3¢
$100 on Yes pays
$2,857 (28.6x)
Volume
$70K
Trade this on Kalshi
Yandy Díaz
3.5%
Kalshi 3.5%polled, 57s agoBest Yes 3.5¢ on Kalshi, $100 pays $2,857 (28.6x)
Kalshi
Contract
Yandy Díaz
Last price
3.5%
As of
Polled just now
Buy Yes
3.5¢
Sell Yes
3.4¢
$100 on Yes pays
$2,857 (28.6x)
Volume
$55K
Trade this on Kalshi
Jacob Misiorowski
2.5%
Kalshi 2.5%polled, 57s agoBest Yes 2.5¢ on Kalshi, $100 pays $4,000 (40.0x)
Kalshi
Contract
Jacob Misiorowski
Last price
2.5%
As of
Polled just now
Buy Yes
2.5¢
Sell Yes
2¢
$100 on Yes pays
$4,000 (40.0x)
Volume
$95K
Trade this on Kalshi
Liam Hicks
1.7%
Kalshi 1.7%polled, 57s agoBest Yes 1.7¢ on Kalshi, $100 pays $5,882 (58.8x)
Kalshi
Contract
Liam Hicks
Last price
1.7%
As of
Polled just now
Buy Yes
1.7¢
Sell Yes
1.6¢
$100 on Yes pays
$5,882 (58.8x)
Volume
$30K
Trade this on Kalshi
Sal Frelick
1.7%
Kalshi 1.7%polled, 57s agoBest Yes 1.7¢ on Kalshi, $100 pays $5,882 (58.8x)
Kalshi
Contract
Sal Frelick
Last price
1.7%
As of
Polled just now
Buy Yes
1.7¢
Sell Yes
1.3¢
$100 on Yes pays
$5,882 (58.8x)
Volume
$86K
Trade this on Kalshi
Chandler Simpson
1.5%
Kalshi 1.5%polled, 57s agoBest Yes 1.5¢ on Kalshi, $100 pays $6,667 (66.7x)
Kalshi
Contract
Chandler Simpson
Last price
1.5%
As of
Polled just now
Buy Yes
1.5¢
Sell Yes
1.2¢
$100 on Yes pays
$6,667 (66.7x)
Volume
$123K
Trade this on Kalshi
Cooper Pratt
1.3%
Kalshi 1.3%polled, 57s agoBest Yes 1.9¢ on Kalshi, $100 pays $5,263 (52.6x)
Kalshi
Contract
Cooper Pratt
Last price
1.3%
As of
Polled just now
Buy Yes
1.9¢
Sell Yes
1.3¢
$100 on Yes pays
$5,263 (52.6x)
Volume
$63K
Trade this on Kalshi
Garrett Mitchell
1.2%
Kalshi 1.2%polled, 57s agoBest Yes 1.3¢ on Kalshi, $100 pays $7,692 (76.9x)
Kalshi
Contract
Garrett Mitchell
Last price
1.2%
As of
Polled just now
Buy Yes
1.3¢
Sell Yes
1.2¢
$100 on Yes pays
$7,692 (76.9x)
Volume
$107K
Trade this on Kalshi
Luis Lara
1%
Kalshi 1%polled, 57s agoBest Yes 1¢ on Kalshi, $100 pays $10,000 (100x)
Kalshi
Contract
Luis Lara
Last price
1%
As of
Polled just now
Buy Yes
1¢
Sell Yes
0.3¢
$100 on Yes pays
$10,000 (100x)
Volume
$42K
Trade this on Kalshi
Freddy Peralta
0.6%
Kalshi 0.6%polled, 57s agoBest Yes 0.9¢ on Kalshi, $100 pays $11,111 (111x)
Kalshi
Contract
Freddy Peralta
Last price
0.6%
As of
Polled just now
Buy Yes
0.9¢
Sell Yes
0.1¢
$100 on Yes pays
$11,111 (111x)
Volume
$66K
Trade this on Kalshi
Jonny DeLuca
0.6%
Kalshi 0.6%polled, 57s agoBest Yes 0.6¢ on Kalshi, $100 pays $16,667 (167x)
Kalshi
Contract
Jonny DeLuca
Last price
0.6%
As of
Polled just now
Buy Yes
0.6¢
Sell Yes
0.5¢
$100 on Yes pays
$16,667 (167x)
Volume
$10K
Trade this on Kalshi
Andrew Vaughn
0.4%
Kalshi 0.4%polled, 57s agoBest Yes 0.4¢ on Kalshi, $100 pays $25,000 (250x)
Kalshi
Contract
Andrew Vaughn
Last price
0.4%
As of
Polled just now
Buy Yes
0.4¢
Sell Yes
0.3¢
$100 on Yes pays
$25,000 (250x)
Volume
$28K
Trade this on Kalshi
Bryan Baker
0.4%
Kalshi 0.4%polled, 57s agoBest Yes 0.4¢ on Kalshi, $100 pays $25,000 (250x)
Kalshi
Contract
Bryan Baker
Last price
0.4%
As of
Polled just now
Buy Yes
0.4¢
Sell Yes
0.3¢
$100 on Yes pays
$25,000 (250x)
Volume
$14K
Trade this on Kalshi
Robert Gasser
0.4%
Kalshi 0.4%polled, 57s agoBest Yes 0.4¢ on Kalshi, $100 pays $25,000 (250x)
Kalshi
Contract
Robert Gasser
Last price
0.4%
As of
Polled just now
Buy Yes
0.4¢
Sell Yes
0.2¢
$100 on Yes pays
$25,000 (250x)
Volume
$24K
Trade this on Kalshi
Trevor Megill
0.4%
Kalshi 0.4%polled, 57s agoBest Yes 0.4¢ on Kalshi, $100 pays $25,000 (250x)
Kalshi
Contract
Trevor Megill
Last price
0.4%
As of
Polled just now
Buy Yes
0.4¢
Sell Yes
0.3¢
$100 on Yes pays
$25,000 (250x)
Volume
$51K
Trade this on Kalshi
Abner Uribe
0.3%
Kalshi 0.3%polled, 57s agoBest Yes 0.3¢ on Kalshi, $100 pays $33,333 (333x)
Kalshi
Contract
Abner Uribe
Last price
0.3%
As of
Polled just now
Buy Yes
0.3¢
Sell Yes
0.2¢
$100 on Yes pays
$33,333 (333x)
Volume
$16K
Trade this on Kalshi
Joey Ortiz
0.3%
Kalshi 0.3%polled, 57s agoBest Yes 0.4¢ on Kalshi, $100 pays $25,000 (250x)
Kalshi
Contract
Joey Ortiz
Last price
0.3%
As of
Polled just now
Buy Yes
0.4¢
Sell Yes
0.3¢
$100 on Yes pays
$25,000 (250x)
Volume
$33K
Trade this on Kalshi
Nick Martinez
0.3%
Kalshi 0.3%polled, 57s agoBest Yes 0.7¢ on Kalshi, $100 pays $14,286 (143x)
Kalshi
Contract
Nick Martinez
Last price
0.3%
As of
Polled just now
Buy Yes
0.7¢
Sell Yes
0.3¢
$100 on Yes pays
$14,286 (143x)
Volume
$100K
Trade this on Kalshi
Cedric Mullins
0.2%
Kalshi 0.2%polled, 57s agoBest Yes 0.2¢ on Kalshi, $100 pays $50,000 (500x)
Kalshi
Contract
Cedric Mullins
Last price
0.2%
As of
Polled just now
Buy Yes
0.2¢
Sell Yes
0.1¢
$100 on Yes pays
$50,000 (500x)
Volume
$62K
Trade this on Kalshi
DL Hall
0.2%
Kalshi 0.2%polled, 57s agoBest Yes 0.2¢ on Kalshi, $100 pays $50,000 (500x)
Kalshi
Contract
DL Hall
Last price
0.2%
As of
Polled just now
Buy Yes
0.2¢
Sell Yes
0.1¢
$100 on Yes pays
$50,000 (500x)
Volume
$12K
Trade this on Kalshi
Dustin May
0.2%
Kalshi 0.2%polled, 57s agoBest Yes 0.2¢ on Kalshi, $100 pays $50,000 (500x)
Kalshi
Contract
Dustin May
Last price
0.2%
As of
Polled just now
Buy Yes
0.2¢
Sell Yes
0.1¢
$100 on Yes pays
$50,000 (500x)
Volume
$8K
Trade this on Kalshi
Shane Drohan
0.2%
Kalshi 0.2%polled, 57s agoBest Yes 0.2¢ on Kalshi, $100 pays $50,000 (500x)
Kalshi
Contract
Shane Drohan
Last price
0.2%
As of
Polled just now
Buy Yes
0.2¢
Sell Yes
0.1¢
$100 on Yes pays
$50,000 (500x)
Volume
$8K
Trade this on Kalshi
Cade Smith
0.1%
Kalshi 0.1%polled, 57s agoBest Yes 0.1¢ on Kalshi, $100 pays $100,000 (1000x)
Kalshi
Contract
Cade Smith
Last price
0.1%
As of
Polled just now
Buy Yes
0.1¢
Sell Yes
—
$100 on Yes pays
$100,000 (1000x)
Volume
$39K
Trade this on Kalshi
Chase DeLauter
0.1%
Kalshi 0.1%polled, 57s agoBest Yes 0.1¢ on Kalshi, $100 pays $100,000 (1000x)
Kalshi
Contract
Chase DeLauter
Last price
0.1%
As of
Polled just now
Buy Yes
0.1¢
Sell Yes
—
$100 on Yes pays
$100,000 (1000x)
Volume
$30K
Trade this on Kalshi
Gavin Williams
0.1%
Kalshi 0.1%polled, 57s agoBest Yes 0.1¢ on Kalshi, $100 pays $100,000 (1000x)
Kalshi
Contract
Gavin Williams
Last price
0.1%
As of
Polled just now
Buy Yes
0.1¢
Sell Yes
—
$100 on Yes pays
$100,000 (1000x)
Volume
$30K
Trade this on Kalshi
Griffin Jax
0.1%
Kalshi 0.1%polled, 57s agoBest Yes 0.2¢ on Kalshi, $100 pays $50,000 (500x)
Kalshi
Contract
Griffin Jax
Last price
0.1%
As of
Polled just now
Buy Yes
0.2¢
Sell Yes
0.1¢
$100 on Yes pays
$50,000 (500x)
Volume
$15K
Trade this on Kalshi
Jo Adell
0.1%
Kalshi 0.1%polled, 57s agoBest Yes 0.1¢ on Kalshi, $100 pays $100,000 (1000x)
Kalshi
Contract
Jo Adell
Last price
0.1%
As of
Polled just now
Buy Yes
0.1¢
Sell Yes
—
$100 on Yes pays
$100,000 (1000x)
Volume
$28K
Trade this on Kalshi
José Ramírez
0.1%
Kalshi 0.1%polled, 57s agoBest Yes 0.1¢ on Kalshi, $100 pays $100,000 (1000x)
Kalshi
Contract
José Ramírez
Last price
0.1%
As of
Polled just now
Buy Yes
0.1¢
Sell Yes
—
$100 on Yes pays
$100,000 (1000x)
Volume
$60K
Trade this on Kalshi
Shane McClanahan
0.1%
Kalshi 0.1%polled, 57s agoBest Yes 0.1¢ on Kalshi, $100 pays $100,000 (1000x)
Kalshi
Contract
Shane McClanahan
Last price
0.1%
As of
Polled just now
Buy Yes
0.1¢
Sell Yes
—
$100 on Yes pays
$100,000 (1000x)
Volume
$8K
Trade this on Kalshi
Steven Kwan
0.1%
Kalshi 0.1%polled, 57s agoBest Yes 0.1¢ on Kalshi, $100 pays $100,000 (1000x)
Kalshi
Contract
Steven Kwan
Last price
0.1%
As of
Polled just now
Buy Yes
0.1¢
Sell Yes
—
$100 on Yes pays
$100,000 (1000x)
Volume
$31K
Trade this on Kalshi
Tanner Bibee
0.1%
Kalshi 0.1%polled, 57s agoBest Yes 0.1¢ on Kalshi, $100 pays $100,000 (1000x)
Kalshi
Contract
Tanner Bibee
Last price
0.1%
As of
Polled just now
Buy Yes
0.1¢
Sell Yes
—
$100 on Yes pays
$100,000 (1000x)
Volume
$6K
Trade this on Kalshi
Travis Bazzana
0.1%
Kalshi 0.1%polled, 57s agoBest Yes 0.1¢ on Kalshi, $100 pays $100,000 (1000x)
Kalshi
Contract
Travis Bazzana
Last price
0.1%
As of
Polled just now
Buy Yes
0.1¢
Sell Yes
—
$100 on Yes pays
$100,000 (1000x)
Volume
$31K
Trade this on Kalshi

Who resolves this market

Polymarket
Polymarket resolves via:
UMA optimistic oracle
Kalshi
Kalshi resolves via:
Kalshi (CFTC-regulated exchange), source: the Governing League

How the odds have moved

The top 3 outcomes on both venues, with the consensus between them. Hover for exact values.

  • Milwaukee Brewers
  • Tampa Bay Rays
  • William Contreras

Order books

Each venue’s resting orders for the selected outcome’s Yes contract, side by side. Top of book streams live; depth refreshes every 15 seconds.

Top of book

Connecting
Best bid
—
Spread
—
Best ask
—

Waiting for the first live quote…

Depth · top 8 levels

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Recent trades

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Kalshi

Kalshi doesn’t list Milwaukee Brewers for this event.

What your stake buys

Enter a stake to see where it buys the most after fees, using each venue’s live order book.

$
Buy

Loading both order books…

Buys at the asks resting now (taker orders), cheapest after fees first, from order-book snapshots up to 15 seconds old. Fees: Kalshi 0.07 × price × (1 − price) per share, rounded up to the cent; Polymarket 0.05 × price × (1 − price) per share (sports rate). Fee calculator. Estimates only, not advice.

About this market

Live prediction market odds for "Pro Baseball World Series Champion 2026". Milwaukee Brewers leads at 74.1%. Next is Tampa Bay Rays at 26.4%. $9.2M has traded across 42 outcomes on Polymarket and Kalshi. The market is expected to resolve by Oct 31, 2026.

This market will resolve according to the team that wins the 2026 MLB World Series. If at any point it becomes impossible for a listed team to win the 2026 MLB World Series per the rules of MLB (e.g., they are eliminated in the playoffs), the corresponding market will resolve to “No”. If the 2026 MLB season is cancelled, postponed after December 31, 2026 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 MLB (https://www.mlb.com/); however, a consensus of credible reporting may also be used.

Questions

What does the consensus price mean?

It is the price of a Yes contract that pays $1 if the outcome happens. A 14¢ price means traders put the chance near 14%. Where two venues list the same outcome, we blend their last prices, weighting the venue with more trading volume more heavily (neither counts for less than a quarter). When only one outcome can win, each venue’s prices add up to a little over 100% (its margin); the fair chance removes that margin so the outcomes add up to exactly 100%.

How is the payout worked out?

A Yes contract pays $1 if it wins, so at the best ask a $100 stake buys 100 ÷ ask contracts. At 18¢ that is about 555 contracts, paying $556 (5.56x) if Yes happens. Venue fees and price slippage on larger orders are not included.

Why do the venues show different prices?

Each venue has its own traders, fees and order book. Contracts can also settle on slightly different terms, which is why each row lists how closely the rules match.

Is a price gap an arbitrage?

Only when you can buy Yes on one venue below what someone pays for Yes on the other, after fees, and both contracts settle the same way. We show the executable bid and ask so you can check.

How fresh are these prices?

Venue prices refresh every few minutes, and the order book and live quotes stream continuously. Each venue’s card shows when we last observed it.

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