The Prediction Markets

Game 1: Tampa Bay vs Milwaukee

Starts in 27 hKickoff
Traded
$625K
Venues
Polymarket, Kalshi
Prices updated
4 h ago
Share

What the markets expect

O/U 3.5 78.5%

Next is Milwaukee Brewers O/U 1.5 at 77.5%. 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.

Prices come from our regular polls of each venue, the oldest 4 h ago. Ages are as of when this page was built.

  • Polymarket
  • Kalshi
O/U 3.5
78.5%
Polymarket 78.5%polled, 4 h agoBest Yes 80¢ on Polymarket, $100 pays $125 (1.25x)
Polymarket
Contract
O/U 3.5
Last price
78.5%
As of
Polled 4 h ago
Buy Yes
80¢
Sell Yes
77¢
$100 on Yes pays
$125 (1.25x)
Trade this on Polymarket
Milwaukee Brewers O/U 1.5
77.5%
Polymarket 77.5%polled, 4 h agoBest Yes 81¢ on Polymarket, $100 pays $123 (1.23x)
Polymarket
Contract
Milwaukee Brewers O/U 1.5
Last price
77.5%
As of
Polled 4 h ago
Buy Yes
81¢
Sell Yes
74¢
$100 on Yes pays
$123 (1.23x)
Trade this on Polymarket
O/U 4.5
70%
Polymarket 70%polled, 4 h agoBest Yes 71¢ on Polymarket, $100 pays $141 (1.41x)
Polymarket
Contract
O/U 4.5
Last price
70%
As of
Polled 4 h ago
Buy Yes
71¢
Sell Yes
69¢
$100 on Yes pays
$141 (1.41x)
Trade this on Polymarket
Tampa Bay Rays O/U 1.5
68.5%
Polymarket 68.5%polled, 4 h agoBest Yes 71¢ on Polymarket, $100 pays $141 (1.41x)
Polymarket
Contract
Tampa Bay Rays O/U 1.5
Last price
68.5%
As of
Polled 4 h ago
Buy Yes
71¢
Sell Yes
66¢
$100 on Yes pays
$141 (1.41x)
Trade this on Polymarket
Milwaukee Brewers O/U 2.5
61%
Polymarket 61%polled, 4 h agoBest Yes 63¢ on Polymarket, $100 pays $159 (1.59x)
Polymarket
Contract
Milwaukee Brewers O/U 2.5
Last price
61%
As of
Polled 4 h ago
Buy Yes
63¢
Sell Yes
59¢
$100 on Yes pays
$159 (1.59x)
Trade this on Polymarket
Milwaukee
60%
Kalshi 60%polled, 4 h agoBest Yes 60¢ on Kalshi, $100 pays $167 (1.67x)
Kalshi
Contract
Milwaukee
Last price
60%
As of
Polled 4 h ago
Buy Yes
60¢
Sell Yes
59¢
$100 on Yes pays
$167 (1.67x)
Volume
$429K
Trade this on Kalshi
1st 5 Innings O/U 2.5
59%
Polymarket 59%polled, 4 h agoBest Yes 60¢ on Polymarket, $100 pays $167 (1.67x)
Polymarket
Contract
1st 5 Innings O/U 2.5
Last price
59%
As of
Polled 4 h ago
Buy Yes
60¢
Sell Yes
58¢
$100 on Yes pays
$167 (1.67x)
Trade this on Polymarket
O/U 5.5
56.5%
Polymarket 56.5%polled, 4 h agoBest Yes 57¢ on Polymarket, $100 pays $175 (1.75x)
Polymarket
Contract
O/U 5.5
Last price
56.5%
As of
Polled 4 h ago
Buy Yes
57¢
Sell Yes
56¢
$100 on Yes pays
$175 (1.75x)
Trade this on Polymarket
Tampa Bay Rays O/U 0.5
53%
Polymarket 53%polled, 4 h agoBest Yes 99¢ on Polymarket, $100 pays $101 (1.01x)
Polymarket
Contract
Tampa Bay Rays O/U 0.5
Last price
53%
As of
Polled 4 h ago
Buy Yes
99¢
Sell Yes
7¢
$100 on Yes pays
$101 (1.01x)
Trade this on Polymarket
Tampa Bay Rays O/U 2.5
49.5%
Polymarket 49.5%polled, 4 h agoBest Yes 51¢ on Polymarket, $100 pays $196 (1.96x)
Polymarket
Contract
Tampa Bay Rays O/U 2.5
Last price
49.5%
As of
Polled 4 h ago
Buy Yes
51¢
Sell Yes
48¢
$100 on Yes pays
$196 (1.96x)
Volume
$4
Trade this on Polymarket
Show 26 more outcomes
O/U 6.5
46.5%
Polymarket 46.5%polled, 4 h agoBest Yes 47¢ on Polymarket, $100 pays $213 (2.13x)
Polymarket
Contract
O/U 6.5
Last price
46.5%
As of
Polled 4 h ago
Buy Yes
47¢
Sell Yes
46¢
$100 on Yes pays
$213 (2.13x)
Volume
$103
Trade this on Polymarket
Milwaukee Brewers O/U 3.5
44.5%
Polymarket 44.5%polled, 4 h agoBest Yes 46¢ on Polymarket, $100 pays $217 (2.17x)
Polymarket
Contract
Milwaukee Brewers O/U 3.5
Last price
44.5%
As of
Polled 4 h ago
Buy Yes
46¢
Sell Yes
43¢
$100 on Yes pays
$217 (2.17x)
Trade this on Polymarket
1st 5 Innings O/U 3.5
44%
Polymarket 44%polled, 4 h agoBest Yes 45¢ on Polymarket, $100 pays $222 (2.22x)
Polymarket
Contract
1st 5 Innings O/U 3.5
Last price
44%
As of
Polled 4 h ago
Buy Yes
45¢
Sell Yes
43¢
$100 on Yes pays
$222 (2.22x)
Trade this on Polymarket
Tampa Bay
40.1%
Polymarket 40.5%polled, 4 h agoKalshi 40%polled, 4 h agoBest Yes 40¢ on Kalshi, $100 pays $250 (2.50x)
Polymarket
Contract
Tampa Bay Rays vs. Milwaukee Brewers
Last price
40.5%
As of
Polled 4 h ago
Buy Yes
41¢
Sell Yes
40¢
$100 on Yes pays
$244 (2.44x)
Volume
$13K
Trade this on Polymarket
Kalshi
Contract
Tampa Bay
Last price
40%
As of
Polled 4 h ago
Buy Yes
40¢
Sell Yes
39¢
$100 on Yes pays
$250 (2.50x)
Volume
$182K
Trade this on Kalshi
Partial parity

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

Prices on these venues are 4 h old, too old to show an executable spread.

NRFI
38.5%
Polymarket 38.5%polled, 4 h agoBest Yes 40¢ on Polymarket, $100 pays $250 (2.50x)
Polymarket
Contract
NRFI
Last price
38.5%
As of
Polled 4 h ago
Buy Yes
40¢
Sell Yes
37¢
$100 on Yes pays
$250 (2.50x)
Volume
$98
Trade this on Polymarket
Spread: Milwaukee Brewers (-1.5)
38.5%
Polymarket 38.5%polled, 4 h agoBest Yes 39¢ on Polymarket, $100 pays $256 (2.56x)
Polymarket
Contract
Spread: Milwaukee Brewers (-1.5)
Last price
38.5%
As of
Polled 4 h ago
Buy Yes
39¢
Sell Yes
38¢
$100 on Yes pays
$256 (2.56x)
Volume
$569
Trade this on Polymarket
1st 5 Innings Spread: Milwaukee Brewers (-1.5)
34.5%
Polymarket 34.5%polled, 4 h agoBest Yes 36¢ on Polymarket, $100 pays $278 (2.78x)
Polymarket
Contract
1st 5 Innings Spread: Milwaukee Brewers (-1.5)
Last price
34.5%
As of
Polled 4 h ago
Buy Yes
36¢
Sell Yes
33¢
$100 on Yes pays
$278 (2.78x)
Trade this on Polymarket
O/U 7.5
34.5%
Polymarket 34.5%polled, 4 h agoBest Yes 35¢ on Polymarket, $100 pays $286 (2.86x)
Polymarket
Contract
O/U 7.5
Last price
34.5%
As of
Polled 4 h ago
Buy Yes
35¢
Sell Yes
34¢
$100 on Yes pays
$286 (2.86x)
Volume
$13
Trade this on Polymarket
Tampa Bay Rays O/U 3.5
34%
Polymarket 34%polled, 4 h agoBest Yes 37¢ on Polymarket, $100 pays $270 (2.70x)
Polymarket
Contract
Tampa Bay Rays O/U 3.5
Last price
34%
As of
Polled 4 h ago
Buy Yes
37¢
Sell Yes
31¢
$100 on Yes pays
$270 (2.70x)
Trade this on Polymarket
1st 5 Innings O/U 4.5
31%
Polymarket 31%polled, 4 h agoBest Yes 34¢ on Polymarket, $100 pays $294 (2.94x)
Polymarket
Contract
1st 5 Innings O/U 4.5
Last price
31%
As of
Polled 4 h ago
Buy Yes
34¢
Sell Yes
28¢
$100 on Yes pays
$294 (2.94x)
Trade this on Polymarket
Milwaukee Brewers O/U 4.5
31%
Polymarket 31%polled, 4 h agoBest Yes 34¢ on Polymarket, $100 pays $294 (2.94x)
Polymarket
Contract
Milwaukee Brewers O/U 4.5
Last price
31%
As of
Polled 4 h ago
Buy Yes
34¢
Sell Yes
28¢
$100 on Yes pays
$294 (2.94x)
Trade this on Polymarket
O/U 8.5
27%
Polymarket 27%polled, 4 h agoBest Yes 28¢ on Polymarket, $100 pays $357 (3.57x)
Polymarket
Contract
O/U 8.5
Last price
27%
As of
Polled 4 h ago
Buy Yes
28¢
Sell Yes
26¢
$100 on Yes pays
$357 (3.57x)
Trade this on Polymarket
Spread: Milwaukee Brewers (-2.5)
27%
Polymarket 27%polled, 4 h agoBest Yes 28¢ on Polymarket, $100 pays $357 (3.57x)
Polymarket
Contract
Spread: Milwaukee Brewers (-2.5)
Last price
27%
As of
Polled 4 h ago
Buy Yes
28¢
Sell Yes
26¢
$100 on Yes pays
$357 (3.57x)
Trade this on Polymarket
Spread: Tampa Bay Rays (-1.5)
27%
Polymarket 27%polled, 4 h agoBest Yes 28¢ on Polymarket, $100 pays $357 (3.57x)
Polymarket
Contract
Spread: Tampa Bay Rays (-1.5)
Last price
27%
As of
Polled 4 h ago
Buy Yes
28¢
Sell Yes
26¢
$100 on Yes pays
$357 (3.57x)
Volume
$125
Trade this on Polymarket
Tampa Bay Rays O/U 4.5
23%
Polymarket 23%polled, 4 h agoBest Yes 27¢ on Polymarket, $100 pays $370 (3.70x)
Polymarket
Contract
Tampa Bay Rays O/U 4.5
Last price
23%
As of
Polled 4 h ago
Buy Yes
27¢
Sell Yes
19¢
$100 on Yes pays
$370 (3.70x)
Trade this on Polymarket
1st 5 Innings O/U 5.5
20.5%
Polymarket 20.5%polled, 4 h agoBest Yes 22¢ on Polymarket, $100 pays $455 (4.55x)
Polymarket
Contract
1st 5 Innings O/U 5.5
Last price
20.5%
As of
Polled 4 h ago
Buy Yes
22¢
Sell Yes
19¢
$100 on Yes pays
$455 (4.55x)
Trade this on Polymarket
Milwaukee Brewers O/U 5.5
20%
Polymarket 20%polled, 4 h agoBest Yes 23¢ on Polymarket, $100 pays $435 (4.35x)
Polymarket
Contract
Milwaukee Brewers O/U 5.5
Last price
20%
As of
Polled 4 h ago
Buy Yes
23¢
Sell Yes
17¢
$100 on Yes pays
$435 (4.35x)
Trade this on Polymarket
1st 5 Innings Spread: Tampa Bay Rays (-1.5)
19.5%
Polymarket 19.5%polled, 4 h agoBest Yes 21¢ on Polymarket, $100 pays $476 (4.76x)
Polymarket
Contract
1st 5 Innings Spread: Tampa Bay Rays (-1.5)
Last price
19.5%
As of
Polled 4 h ago
Buy Yes
21¢
Sell Yes
18¢
$100 on Yes pays
$476 (4.76x)
Volume
$10
Trade this on Polymarket
O/U 9.5
18%
Polymarket 18%polled, 4 h agoBest Yes 19¢ on Polymarket, $100 pays $526 (5.26x)
Polymarket
Contract
O/U 9.5
Last price
18%
As of
Polled 4 h ago
Buy Yes
19¢
Sell Yes
17¢
$100 on Yes pays
$526 (5.26x)
Trade this on Polymarket
Spread: Milwaukee Brewers (-3.5)
18%
Polymarket 18%polled, 4 h agoBest Yes 19¢ on Polymarket, $100 pays $526 (5.26x)
Polymarket
Contract
Spread: Milwaukee Brewers (-3.5)
Last price
18%
As of
Polled 4 h ago
Buy Yes
19¢
Sell Yes
17¢
$100 on Yes pays
$526 (5.26x)
Volume
$12
Trade this on Polymarket
Spread: Tampa Bay Rays (-2.5)
18%
Polymarket 18%polled, 4 h agoBest Yes 19¢ on Polymarket, $100 pays $526 (5.26x)
Polymarket
Contract
Spread: Tampa Bay Rays (-2.5)
Last price
18%
As of
Polled 4 h ago
Buy Yes
19¢
Sell Yes
17¢
$100 on Yes pays
$526 (5.26x)
Trade this on Polymarket
Extra Innings
13.5%
Polymarket 13.5%polled, 4 h agoBest Yes 16¢ on Polymarket, $100 pays $625 (6.25x)
Polymarket
Contract
Extra Innings
Last price
13.5%
As of
Polled 4 h ago
Buy Yes
16¢
Sell Yes
11¢
$100 on Yes pays
$625 (6.25x)
Trade this on Polymarket
1st 5 Innings O/U 6.5
12.5%
Polymarket 12.5%polled, 4 h agoBest Yes 15¢ on Polymarket, $100 pays $667 (6.67x)
Polymarket
Contract
1st 5 Innings O/U 6.5
Last price
12.5%
As of
Polled 4 h ago
Buy Yes
15¢
Sell Yes
10¢
$100 on Yes pays
$667 (6.67x)
Trade this on Polymarket
Spread: Tampa Bay Rays (-3.5)
12%
Polymarket 12%polled, 4 h agoBest Yes 13¢ on Polymarket, $100 pays $769 (7.69x)
Polymarket
Contract
Spread: Tampa Bay Rays (-3.5)
Last price
12%
As of
Polled 4 h ago
Buy Yes
13¢
Sell Yes
11¢
$100 on Yes pays
$769 (7.69x)
Trade this on Polymarket
Spread: Milwaukee Brewers (-4.5)
11.5%
Polymarket 11.5%polled, 4 h agoBest Yes 13¢ on Polymarket, $100 pays $769 (7.69x)
Polymarket
Contract
Spread: Milwaukee Brewers (-4.5)
Last price
11.5%
As of
Polled 4 h ago
Buy Yes
13¢
Sell Yes
10¢
$100 on Yes pays
$769 (7.69x)
Trade this on Polymarket
Spread: Tampa Bay Rays (-4.5)
5.5%
Polymarket 5.5%polled, 4 h agoBest Yes 7¢ on Polymarket, $100 pays $1,429 (14.3x)
Polymarket
Contract
Spread: Tampa Bay Rays (-4.5)
Last price
5.5%
As of
Polled 4 h ago
Buy Yes
7¢
Sell Yes
4¢
$100 on Yes pays
$1,429 (14.3x)
Volume
$6
Trade this on Polymarket

Venue prices are 4 h old, so we are not showing a cross-venue spread. Check each venue for current prices. Find markets with fresh 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
  • O/U 4.5

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 "Game 1: Tampa Bay vs Milwaukee". O/U 3.5 leads at 78.5%. Next is Milwaukee Brewers O/U 1.5 at 77.5%. $625K has traded across 36 outcomes on Kalshi and Polymarket. The market is expected to resolve by Oct 27, 2026.

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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