The Prediction Markets

Tampa Bay Rays vs. Milwaukee Brewers

Starts in 15 hKickoff
Traded
$5.9M
Venues
Polymarket, Kalshi
Prices updated
just now
Share

What the markets expect

O/U 3.5 81.5%

Next is Milwaukee Brewers O/U 1.5 at 81%. Polymarket and Kalshi agree within 1 point on each matched outcome.

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.

2 of 37 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
O/U 3.5
81.5%
Polymarket 81.5%polled, 31s agoBest Yes 83¢ on Polymarket, $100 pays $120 (1.20x)
Polymarket
Contract
O/U 3.5
Last price
81.5%
As of
Polled just now
Buy Yes
83¢
Sell Yes
80¢
$100 on Yes pays
$120 (1.20x)
Trade this on Polymarket
Milwaukee Brewers O/U 1.5
81%
Polymarket 81%polled, 31s agoBest Yes 84¢ on Polymarket, $100 pays $119 (1.19x)
Polymarket
Contract
Milwaukee Brewers O/U 1.5
Last price
81%
As of
Polled just now
Buy Yes
84¢
Sell Yes
78¢
$100 on Yes pays
$119 (1.19x)
Trade this on Polymarket
Tampa Bay Rays O/U 0.5
73.5%
Polymarket 73.5%polled, 31s agoBest Yes 99¢ on Polymarket, $100 pays $101 (1.01x)
Polymarket
Contract
Tampa Bay Rays O/U 0.5
Last price
73.5%
As of
Polled just now
Buy Yes
99¢
Sell Yes
48¢
$100 on Yes pays
$101 (1.01x)
Trade this on Polymarket
O/U 4.5
73%
Polymarket 73%polled, 31s agoBest Yes 74¢ on Polymarket, $100 pays $135 (1.35x)
Polymarket
Contract
O/U 4.5
Last price
73%
As of
Polled just now
Buy Yes
74¢
Sell Yes
72¢
$100 on Yes pays
$135 (1.35x)
Volume
$32
Trade this on Polymarket
Tampa Bay Rays O/U 1.5
69%
Polymarket 69%polled, 31s agoBest Yes 71¢ on Polymarket, $100 pays $141 (1.41x)
Polymarket
Contract
Tampa Bay Rays O/U 1.5
Last price
69%
As of
Polled just now
Buy Yes
71¢
Sell Yes
67¢
$100 on Yes pays
$141 (1.41x)
Volume
$3
Trade this on Polymarket
Milwaukee Brewers O/U 2.5
66.5%
Polymarket 66.5%polled, 31s agoBest Yes 68¢ on Polymarket, $100 pays $147 (1.47x)
Polymarket
Contract
Milwaukee Brewers O/U 2.5
Last price
66.5%
As of
Polled just now
Buy Yes
68¢
Sell Yes
65¢
$100 on Yes pays
$147 (1.47x)
Trade this on Polymarket
Milwaukee
63%
Kalshi 63%polled, 31s agoBest Yes 63¢ on Kalshi, $100 pays $159 (1.59x)
Kalshi
Contract
Milwaukee
Last price
63%
As of
Polled just now
Buy Yes
63¢
Sell Yes
62¢
$100 on Yes pays
$159 (1.59x)
Volume
$5.3M
Trade this on Kalshi
1st 5 Innings O/U 2.5
62.5%
Polymarket 62.5%polled, 31s agoBest Yes 64¢ on Polymarket, $100 pays $156 (1.56x)
Polymarket
Contract
1st 5 Innings O/U 2.5
Last price
62.5%
As of
Polled just now
Buy Yes
64¢
Sell Yes
61¢
$100 on Yes pays
$156 (1.56x)
Volume
$5
Trade this on Polymarket
O/U 5.5
60.5%
Polymarket 60.5%polled, 31s agoBest Yes 61¢ on Polymarket, $100 pays $164 (1.64x)
Polymarket
Contract
O/U 5.5
Last price
60.5%
As of
Polled just now
Buy Yes
61¢
Sell Yes
60¢
$100 on Yes pays
$164 (1.64x)
Volume
$183
Trade this on Polymarket
O/U 6.5
51.5%
Polymarket 51.5%polled, 31s agoBest Yes 52¢ on Polymarket, $100 pays $192 (1.92x)
Polymarket
Contract
O/U 6.5
Last price
51.5%
As of
Polled just now
Buy Yes
52¢
Sell Yes
51¢
$100 on Yes pays
$192 (1.92x)
Volume
$1K
Trade this on Polymarket
Show 26 more outcomes
Tampa Bay Rays O/U 2.5
50.5%
Polymarket 50.5%polled, 31s agoBest Yes 52¢ on Polymarket, $100 pays $192 (1.92x)
Polymarket
Contract
Tampa Bay Rays O/U 2.5
Last price
50.5%
As of
Polled just now
Buy Yes
52¢
Sell Yes
49¢
$100 on Yes pays
$192 (1.92x)
Volume
$8
Trade this on Polymarket
Milwaukee Brewers O/U 3.5
50%
Polymarket 50%polled, 31s agoBest Yes 51¢ on Polymarket, $100 pays $196 (1.96x)
Polymarket
Contract
Milwaukee Brewers O/U 3.5
Last price
50%
As of
Polled just now
Buy Yes
51¢
Sell Yes
49¢
$100 on Yes pays
$196 (1.96x)
Trade this on Polymarket
1st 5 Innings O/U 3.5
47.5%
Polymarket 47.5%polled, 31s agoBest Yes 48¢ on Polymarket, $100 pays $208 (2.08x)
Polymarket
Contract
1st 5 Innings O/U 3.5
Last price
47.5%
As of
Polled just now
Buy Yes
48¢
Sell Yes
47¢
$100 on Yes pays
$208 (2.08x)
Volume
$10
Trade this on Polymarket
Spread: Milwaukee Brewers (-1.5)
42.5%
Polymarket 42.5%polled, 31s agoBest Yes 43¢ on Polymarket, $100 pays $233 (2.33x)
Polymarket
Contract
Spread: Milwaukee Brewers (-1.5)
Last price
42.5%
As of
Polled just now
Buy Yes
43¢
Sell Yes
42¢
$100 on Yes pays
$233 (2.33x)
Volume
$660
Trade this on Polymarket
NRFI
41%
Polymarket 41%polled, 31s agoBest Yes 42¢ on Polymarket, $100 pays $238 (2.38x)
Polymarket
Contract
NRFI
Last price
41%
As of
Polled just now
Buy Yes
42¢
Sell Yes
40¢
$100 on Yes pays
$238 (2.38x)
Volume
$98
Trade this on Polymarket
O/U 7.5
37.5%
Polymarket 37.5%polled, 31s agoBest Yes 38¢ on Polymarket, $100 pays $263 (2.63x)
Polymarket
Contract
O/U 7.5
Last price
37.5%
As of
Polled just now
Buy Yes
38¢
Sell Yes
37¢
$100 on Yes pays
$263 (2.63x)
Volume
$18
Trade this on Polymarket
Tampa Bay
37.1%
Polymarket 37.5%live, just nowKalshi 37%live, just nowBest Yes 38¢ on Polymarket, $100 pays $263 (2.63x)
Polymarket
Contract
Tampa Bay Rays vs. Milwaukee Brewers
Price
37.5%
As of
Live feed, just now
Buy Yes
38¢
Sell Yes
37¢
$100 on Yes pays
$263 (2.63x)
Volume
$112K
Trade this on Polymarket
Kalshi
Contract
Tampa Bay
Price
37%
As of
Live feed, just now
Buy Yes
38¢
Sell Yes
37¢
$100 on Yes pays
$263 (2.63x)
Volume
$444K
Trade this on Kalshi
Partial parity

Payoffs match in ordinary outcomes; see the rule differences below the table.

No arbitrage: the best bid elsewhere is 37¢, at or below the cheapest ask of 38¢.

1st 5 Innings Spread: Milwaukee Brewers (-1.5)
36.5%
Polymarket 36.5%polled, 31s agoBest Yes 38¢ on Polymarket, $100 pays $263 (2.63x)
Polymarket
Contract
1st 5 Innings Spread: Milwaukee Brewers (-1.5)
Last price
36.5%
As of
Polled just now
Buy Yes
38¢
Sell Yes
35¢
$100 on Yes pays
$263 (2.63x)
Trade this on Polymarket
Milwaukee Brewers O/U 4.5
35.5%
Polymarket 35.5%polled, 31s agoBest Yes 38¢ on Polymarket, $100 pays $263 (2.63x)
Polymarket
Contract
Milwaukee Brewers O/U 4.5
Last price
35.5%
As of
Polled just now
Buy Yes
38¢
Sell Yes
33¢
$100 on Yes pays
$263 (2.63x)
Volume
$5
Trade this on Polymarket
Tampa Bay Rays O/U 3.5
35%
Polymarket 35%polled, 31s agoBest Yes 37¢ on Polymarket, $100 pays $270 (2.70x)
Polymarket
Contract
Tampa Bay Rays O/U 3.5
Last price
35%
As of
Polled just now
Buy Yes
37¢
Sell Yes
33¢
$100 on Yes pays
$270 (2.70x)
Trade this on Polymarket
1st 5 Innings O/U 4.5
33%
Polymarket 33%polled, 31s agoBest Yes 34¢ on Polymarket, $100 pays $294 (2.94x)
Polymarket
Contract
1st 5 Innings O/U 4.5
Last price
33%
As of
Polled just now
Buy Yes
34¢
Sell Yes
32¢
$100 on Yes pays
$294 (2.94x)
Volume
$5
Trade this on Polymarket
Spread: Milwaukee Brewers (-2.5)
29.5%
Polymarket 29.5%polled, 31s agoBest Yes 30¢ on Polymarket, $100 pays $333 (3.33x)
Polymarket
Contract
Spread: Milwaukee Brewers (-2.5)
Last price
29.5%
As of
Polled just now
Buy Yes
30¢
Sell Yes
29¢
$100 on Yes pays
$333 (3.33x)
Volume
$12
Trade this on Polymarket
O/U 8.5
29%
Polymarket 29%polled, 31s agoBest Yes 30¢ on Polymarket, $100 pays $333 (3.33x)
Polymarket
Contract
O/U 8.5
Last price
29%
As of
Polled just now
Buy Yes
30¢
Sell Yes
28¢
$100 on Yes pays
$333 (3.33x)
Trade this on Polymarket
Spread: Tampa Bay Rays (-1.5)
25.5%
Polymarket 25.5%polled, 31s agoBest Yes 26¢ on Polymarket, $100 pays $385 (3.85x)
Polymarket
Contract
Spread: Tampa Bay Rays (-1.5)
Last price
25.5%
As of
Polled just now
Buy Yes
26¢
Sell Yes
25¢
$100 on Yes pays
$385 (3.85x)
Volume
$125
Trade this on Polymarket
Milwaukee Brewers O/U 5.5
25%
Polymarket 25%polled, 31s agoBest Yes 27¢ on Polymarket, $100 pays $370 (3.70x)
Polymarket
Contract
Milwaukee Brewers O/U 5.5
Last price
25%
As of
Polled just now
Buy Yes
27¢
Sell Yes
23¢
$100 on Yes pays
$370 (3.70x)
Trade this on Polymarket
Tampa Bay Rays O/U 4.5
23.5%
Polymarket 23.5%polled, 31s agoBest Yes 27¢ on Polymarket, $100 pays $370 (3.70x)
Polymarket
Contract
Tampa Bay Rays O/U 4.5
Last price
23.5%
As of
Polled just now
Buy Yes
27¢
Sell Yes
20¢
$100 on Yes pays
$370 (3.70x)
Trade this on Polymarket
1st 5 Innings O/U 5.5
23%
Polymarket 23%polled, 31s agoBest Yes 25¢ on Polymarket, $100 pays $400 (4.00x)
Polymarket
Contract
1st 5 Innings O/U 5.5
Last price
23%
As of
Polled just now
Buy Yes
25¢
Sell Yes
21¢
$100 on Yes pays
$400 (4.00x)
Trade this on Polymarket
O/U 9.5
20.5%
Polymarket 20.5%polled, 31s agoBest Yes 22¢ on Polymarket, $100 pays $455 (4.55x)
Polymarket
Contract
O/U 9.5
Last price
20.5%
As of
Polled just now
Buy Yes
22¢
Sell Yes
19¢
$100 on Yes pays
$455 (4.55x)
Trade this on Polymarket
Spread: Milwaukee Brewers (-3.5)
20%
Polymarket 20%polled, 31s agoBest Yes 21¢ on Polymarket, $100 pays $476 (4.76x)
Polymarket
Contract
Spread: Milwaukee Brewers (-3.5)
Last price
20%
As of
Polled just now
Buy Yes
21¢
Sell Yes
19¢
$100 on Yes pays
$476 (4.76x)
Volume
$12
Trade this on Polymarket
1st 5 Innings Spread: Tampa Bay Rays (-1.5)
16%
Polymarket 16%polled, 31s agoBest Yes 17¢ on Polymarket, $100 pays $588 (5.88x)
Polymarket
Contract
1st 5 Innings Spread: Tampa Bay Rays (-1.5)
Last price
16%
As of
Polled just now
Buy Yes
17¢
Sell Yes
15¢
$100 on Yes pays
$588 (5.88x)
Volume
$14
Trade this on Polymarket
1st 5 Innings O/U 6.5
15%
Polymarket 15%polled, 31s agoBest Yes 16¢ on Polymarket, $100 pays $625 (6.25x)
Polymarket
Contract
1st 5 Innings O/U 6.5
Last price
15%
As of
Polled just now
Buy Yes
16¢
Sell Yes
14¢
$100 on Yes pays
$625 (6.25x)
Trade this on Polymarket
Spread: Tampa Bay Rays (-2.5)
15%
Polymarket 15%polled, 31s agoBest Yes 16¢ on Polymarket, $100 pays $625 (6.25x)
Polymarket
Contract
Spread: Tampa Bay Rays (-2.5)
Last price
15%
As of
Polled just now
Buy Yes
16¢
Sell Yes
14¢
$100 on Yes pays
$625 (6.25x)
Volume
$606
Trade this on Polymarket
Spread: Milwaukee Brewers (-4.5)
13%
Polymarket 13%polled, 31s agoBest Yes 15¢ on Polymarket, $100 pays $667 (6.67x)
Polymarket
Contract
Spread: Milwaukee Brewers (-4.5)
Last price
13%
As of
Polled just now
Buy Yes
15¢
Sell Yes
11¢
$100 on Yes pays
$667 (6.67x)
Trade this on Polymarket
Extra Innings
12.5%
Polymarket 12.5%polled, 31s agoBest Yes 14¢ on Polymarket, $100 pays $714 (7.14x)
Polymarket
Contract
Extra Innings
Last price
12.5%
As of
Polled just now
Buy Yes
14¢
Sell Yes
11¢
$100 on Yes pays
$714 (7.14x)
Volume
$36
Trade this on Polymarket
Spread: Tampa Bay Rays (-3.5)
9.5%
Polymarket 9.5%polled, 31s agoBest Yes 11¢ on Polymarket, $100 pays $909 (9.09x)
Polymarket
Contract
Spread: Tampa Bay Rays (-3.5)
Last price
9.5%
As of
Polled just now
Buy Yes
11¢
Sell Yes
8¢
$100 on Yes pays
$909 (9.09x)
Trade this on Polymarket
Spread: Tampa Bay Rays (-4.5)
4.5%
Polymarket 4.5%polled, 31s agoBest Yes 6¢ on Polymarket, $100 pays $1,667 (16.7x)
Polymarket
Contract
Spread: Tampa Bay Rays (-4.5)
Last price
4.5%
As of
Polled just now
Buy Yes
6¢
Sell Yes
3¢
$100 on Yes pays
$1,667 (16.7x)
Volume
$6
Trade this on Polymarket

No cross-venue arbitrage right now: on every matched outcome, the best bid on one venue is at or below the cheapest ask on the other. Find markets with open spreads

Same bet: both pay the winner of the game

Ties: both venues pay 50/50.

Only differs in an edge case

  • If the game is postponed: Kalshi resolves to a fair price if the game does not start within 48 hours of the scheduled time; Polymarket stays open until the game is played and resolves 50-50 only if it is cancelled with no make-up.
Polymarket
Polymarket resolves via:
UMA optimistic oracle, source: mlb.com
Kalshi
Kalshi resolves via:
Kalshi (CFTC-regulated exchange), source: ESPN, Fox Sports, the Governing League
Show full rule comparison
  • If the game is postponed: Kalshi resolves to a fair price if the game does not start within 48 hours of the scheduled time; Polymarket stays open until the game is played and resolves 50-50 only if it is cancelled with no make-up.
  • Ties: both venues pay 50/50.
  • Trading closes Oct 24, 2026, 12:00 AM UTC on Polymarket and Oct 27, 2026, 12:00 AM UTC on Kalshi.

Summarized from each venue’s published rules; the venue’s own rules page is the final word.

How the odds have moved

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

  • O/U 3.5
  • Milwaukee Brewers O/U 1.5
  • Tampa Bay Rays O/U 0.5

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.

Polymarket

Open on Polymarket ↗

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 O/U 3.5 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 "Tampa Bay Rays vs. Milwaukee Brewers". O/U 3.5 leads at 81.5%. Next is Milwaukee Brewers O/U 1.5 at 81%. $5.9M has traded across 36 outcomes on Kalshi and Polymarket. The market is expected to resolve by Oct 24, 2026.

In the upcoming MLB game between the Tampa Bay Rays and Milwaukee Brewers, scheduled for October 23 at 8:00PM ET: This market will resolve to "Tampa Bay Rays" if the Tampa Bay Rays win the game. This market will resolve to "Milwaukee Brewers" if the Milwaukee Brewers 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.

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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