The Prediction Markets

Game 1: Tampa Bay vs Milwaukee

Starts in 19 hKickoff
Traded
$5.4M
Venues
Polymarket, Kalshi
Prices updated
1 h ago
Share

What the markets expect

O/U 3.5 81%

Next is Milwaukee Brewers O/U 1.5 at 80.5%. 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.

2 of 37 prices are live from the exchange feeds; the rest come from our regular price polls, the oldest 1 h ago. Ages are as of when this page was built.

  • Polymarket
  • Kalshi
O/U 3.5
81%
Polymarket 81%polled, 1 h agoBest Yes 82¢ on Polymarket, $100 pays $122 (1.22x)
Polymarket
Contract
O/U 3.5
Last price
81%
As of
Polled 1 h ago
Buy Yes
82¢
Sell Yes
80¢
$100 on Yes pays
$122 (1.22x)
Trade this on Polymarket
Milwaukee Brewers O/U 1.5
80.5%
Polymarket 80.5%polled, 1 h agoBest Yes 83¢ on Polymarket, $100 pays $120 (1.20x)
Polymarket
Contract
Milwaukee Brewers O/U 1.5
Last price
80.5%
As of
Polled 1 h ago
Buy Yes
83¢
Sell Yes
78¢
$100 on Yes pays
$120 (1.20x)
Trade this on Polymarket
O/U 4.5
73%
Polymarket 73%polled, 1 h agoBest Yes 74¢ on Polymarket, $100 pays $135 (1.35x)
Polymarket
Contract
O/U 4.5
Last price
73%
As of
Polled 1 h ago
Buy Yes
74¢
Sell Yes
72¢
$100 on Yes pays
$135 (1.35x)
Volume
$15
Trade this on Polymarket
Tampa Bay Rays O/U 1.5
68.5%
Polymarket 68.5%polled, 1 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 1 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
65.5%
Polymarket 65.5%polled, 1 h agoBest Yes 68¢ on Polymarket, $100 pays $147 (1.47x)
Polymarket
Contract
Milwaukee Brewers O/U 2.5
Last price
65.5%
As of
Polled 1 h ago
Buy Yes
68¢
Sell Yes
63¢
$100 on Yes pays
$147 (1.47x)
Trade this on Polymarket
1st 5 Innings O/U 2.5
63%
Polymarket 63%polled, 1 h agoBest Yes 64¢ on Polymarket, $100 pays $156 (1.56x)
Polymarket
Contract
1st 5 Innings O/U 2.5
Last price
63%
As of
Polled 1 h ago
Buy Yes
64¢
Sell Yes
62¢
$100 on Yes pays
$156 (1.56x)
Trade this on Polymarket
Milwaukee
63%
Kalshi 63%polled, 1 h agoBest Yes 63¢ on Kalshi, $100 pays $159 (1.59x)
Kalshi
Contract
Milwaukee
Last price
63%
As of
Polled 1 h ago
Buy Yes
63¢
Sell Yes
62¢
$100 on Yes pays
$159 (1.59x)
Volume
$5.1M
Trade this on Kalshi
O/U 5.5
60.5%
Polymarket 60.5%polled, 1 h agoBest Yes 61¢ on Polymarket, $100 pays $164 (1.64x)
Polymarket
Contract
O/U 5.5
Last price
60.5%
As of
Polled 1 h ago
Buy Yes
61¢
Sell Yes
60¢
$100 on Yes pays
$164 (1.64x)
Volume
$183
Trade this on Polymarket
Tampa Bay Rays O/U 0.5
53%
Polymarket 53%polled, 1 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 1 h ago
Buy Yes
99¢
Sell Yes
7¢
$100 on Yes pays
$101 (1.01x)
Trade this on Polymarket
O/U 6.5
51.5%
Polymarket 51.5%polled, 1 h agoBest Yes 52¢ on Polymarket, $100 pays $192 (1.92x)
Polymarket
Contract
O/U 6.5
Last price
51.5%
As of
Polled 1 h ago
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, 1 h 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 1 h ago
Buy Yes
52¢
Sell Yes
49¢
$100 on Yes pays
$192 (1.92x)
Volume
$4
Trade this on Polymarket
Milwaukee Brewers O/U 3.5
49.5%
Polymarket 49.5%polled, 1 h agoBest Yes 51¢ on Polymarket, $100 pays $196 (1.96x)
Polymarket
Contract
Milwaukee Brewers O/U 3.5
Last price
49.5%
As of
Polled 1 h ago
Buy Yes
51¢
Sell Yes
48¢
$100 on Yes pays
$196 (1.96x)
Trade this on Polymarket
1st 5 Innings O/U 3.5
47.5%
Polymarket 47.5%polled, 1 h agoBest Yes 49¢ on Polymarket, $100 pays $204 (2.04x)
Polymarket
Contract
1st 5 Innings O/U 3.5
Last price
47.5%
As of
Polled 1 h ago
Buy Yes
49¢
Sell Yes
46¢
$100 on Yes pays
$204 (2.04x)
Trade this on Polymarket
Spread: Milwaukee Brewers (-1.5)
41.5%
Polymarket 41.5%polled, 1 h agoBest Yes 42¢ on Polymarket, $100 pays $238 (2.38x)
Polymarket
Contract
Spread: Milwaukee Brewers (-1.5)
Last price
41.5%
As of
Polled 1 h ago
Buy Yes
42¢
Sell Yes
41¢
$100 on Yes pays
$238 (2.38x)
Volume
$571
Trade this on Polymarket
NRFI
41%
Polymarket 41%polled, 1 h agoBest Yes 42¢ on Polymarket, $100 pays $238 (2.38x)
Polymarket
Contract
NRFI
Last price
41%
As of
Polled 1 h ago
Buy Yes
42¢
Sell Yes
40¢
$100 on Yes pays
$238 (2.38x)
Volume
$98
Trade this on Polymarket
Tampa Bay
37.2%
Polymarket 37.5%live, 1 h agoKalshi 37%live, 1 h agoBest Yes 38¢ on Polymarket, $100 pays $263 (2.63x)
Polymarket
Contract
Tampa Bay Rays vs. Milwaukee Brewers
Price
37.5%
As of
Live feed, 1 h ago
Buy Yes
38¢
Sell Yes
37¢
$100 on Yes pays
$263 (2.63x)
Volume
$107K
Trade this on Polymarket
Kalshi
Contract
Tampa Bay
Price
37%
As of
Live feed, 1 h ago
Buy Yes
38¢
Sell Yes
37¢
$100 on Yes pays
$263 (2.63x)
Volume
$243K
Trade this on Kalshi
Partial parity

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

Indicative only, prices are 1 h old: No arbitrage: the best bid elsewhere is 37¢, at or below the cheapest ask of 38¢.

O/U 7.5
37%
Polymarket 37%polled, 1 h agoBest Yes 38¢ on Polymarket, $100 pays $263 (2.63x)
Polymarket
Contract
O/U 7.5
Last price
37%
As of
Polled 1 h ago
Buy Yes
38¢
Sell Yes
36¢
$100 on Yes pays
$263 (2.63x)
Volume
$18
Trade this on Polymarket
Milwaukee Brewers O/U 4.5
36%
Polymarket 36%polled, 1 h agoBest Yes 38¢ on Polymarket, $100 pays $263 (2.63x)
Polymarket
Contract
Milwaukee Brewers O/U 4.5
Last price
36%
As of
Polled 1 h ago
Buy Yes
38¢
Sell Yes
34¢
$100 on Yes pays
$263 (2.63x)
Trade this on Polymarket
1st 5 Innings Spread: Milwaukee Brewers (-1.5)
35%
Polymarket 35%polled, 1 h agoBest Yes 36¢ on Polymarket, $100 pays $278 (2.78x)
Polymarket
Contract
1st 5 Innings Spread: Milwaukee Brewers (-1.5)
Last price
35%
As of
Polled 1 h ago
Buy Yes
36¢
Sell Yes
34¢
$100 on Yes pays
$278 (2.78x)
Trade this on Polymarket
Tampa Bay Rays O/U 3.5
35%
Polymarket 35%polled, 1 h agoBest Yes 38¢ on Polymarket, $100 pays $263 (2.63x)
Polymarket
Contract
Tampa Bay Rays O/U 3.5
Last price
35%
As of
Polled 1 h ago
Buy Yes
38¢
Sell Yes
32¢
$100 on Yes pays
$263 (2.63x)
Trade this on Polymarket
1st 5 Innings O/U 4.5
34%
Polymarket 34%polled, 1 h agoBest Yes 36¢ on Polymarket, $100 pays $278 (2.78x)
Polymarket
Contract
1st 5 Innings O/U 4.5
Last price
34%
As of
Polled 1 h ago
Buy Yes
36¢
Sell Yes
32¢
$100 on Yes pays
$278 (2.78x)
Trade this on Polymarket
O/U 8.5
29%
Polymarket 29%polled, 1 h agoBest Yes 30¢ on Polymarket, $100 pays $333 (3.33x)
Polymarket
Contract
O/U 8.5
Last price
29%
As of
Polled 1 h ago
Buy Yes
30¢
Sell Yes
28¢
$100 on Yes pays
$333 (3.33x)
Trade this on Polymarket
Spread: Milwaukee Brewers (-2.5)
28.5%
Polymarket 28.5%polled, 1 h agoBest Yes 29¢ on Polymarket, $100 pays $345 (3.45x)
Polymarket
Contract
Spread: Milwaukee Brewers (-2.5)
Last price
28.5%
As of
Polled 1 h ago
Buy Yes
29¢
Sell Yes
28¢
$100 on Yes pays
$345 (3.45x)
Volume
$5
Trade this on Polymarket
Spread: Tampa Bay Rays (-1.5)
25.5%
Polymarket 25.5%polled, 1 h 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 1 h ago
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
24.5%
Polymarket 24.5%polled, 1 h agoBest Yes 28¢ on Polymarket, $100 pays $357 (3.57x)
Polymarket
Contract
Milwaukee Brewers O/U 5.5
Last price
24.5%
As of
Polled 1 h ago
Buy Yes
28¢
Sell Yes
21¢
$100 on Yes pays
$357 (3.57x)
Trade this on Polymarket
1st 5 Innings O/U 5.5
24%
Polymarket 24%polled, 1 h agoBest Yes 26¢ on Polymarket, $100 pays $385 (3.85x)
Polymarket
Contract
1st 5 Innings O/U 5.5
Last price
24%
As of
Polled 1 h ago
Buy Yes
26¢
Sell Yes
22¢
$100 on Yes pays
$385 (3.85x)
Trade this on Polymarket
Tampa Bay Rays O/U 4.5
23.5%
Polymarket 23.5%polled, 1 h agoBest Yes 28¢ on Polymarket, $100 pays $357 (3.57x)
Polymarket
Contract
Tampa Bay Rays O/U 4.5
Last price
23.5%
As of
Polled 1 h ago
Buy Yes
28¢
Sell Yes
19¢
$100 on Yes pays
$357 (3.57x)
Trade this on Polymarket
O/U 9.5
21.5%
Polymarket 21.5%polled, 1 h agoBest Yes 23¢ on Polymarket, $100 pays $435 (4.35x)
Polymarket
Contract
O/U 9.5
Last price
21.5%
As of
Polled 1 h ago
Buy Yes
23¢
Sell Yes
20¢
$100 on Yes pays
$435 (4.35x)
Trade this on Polymarket
Spread: Milwaukee Brewers (-3.5)
20%
Polymarket 20%polled, 1 h agoBest Yes 21¢ on Polymarket, $100 pays $476 (4.76x)
Polymarket
Contract
Spread: Milwaukee Brewers (-3.5)
Last price
20%
As of
Polled 1 h ago
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)
19.5%
Polymarket 19.5%polled, 1 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 1 h ago
Buy Yes
21¢
Sell Yes
18¢
$100 on Yes pays
$476 (4.76x)
Volume
$14
Trade this on Polymarket
1st 5 Innings O/U 6.5
16%
Polymarket 16%polled, 1 h agoBest Yes 17¢ on Polymarket, $100 pays $588 (5.88x)
Polymarket
Contract
1st 5 Innings O/U 6.5
Last price
16%
As of
Polled 1 h ago
Buy Yes
17¢
Sell Yes
15¢
$100 on Yes pays
$588 (5.88x)
Trade this on Polymarket
Spread: Tampa Bay Rays (-2.5)
15.5%
Polymarket 15.5%polled, 1 h agoBest Yes 17¢ on Polymarket, $100 pays $588 (5.88x)
Polymarket
Contract
Spread: Tampa Bay Rays (-2.5)
Last price
15.5%
As of
Polled 1 h ago
Buy Yes
17¢
Sell Yes
14¢
$100 on Yes pays
$588 (5.88x)
Trade this on Polymarket
Spread: Milwaukee Brewers (-4.5)
13%
Polymarket 13%polled, 1 h agoBest Yes 14¢ on Polymarket, $100 pays $714 (7.14x)
Polymarket
Contract
Spread: Milwaukee Brewers (-4.5)
Last price
13%
As of
Polled 1 h ago
Buy Yes
14¢
Sell Yes
12¢
$100 on Yes pays
$714 (7.14x)
Trade this on Polymarket
Extra Innings
12.5%
Polymarket 12.5%polled, 1 h agoBest Yes 15¢ on Polymarket, $100 pays $667 (6.67x)
Polymarket
Contract
Extra Innings
Last price
12.5%
As of
Polled 1 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)
10.5%
Polymarket 10.5%polled, 1 h agoBest Yes 12¢ on Polymarket, $100 pays $833 (8.33x)
Polymarket
Contract
Spread: Tampa Bay Rays (-3.5)
Last price
10.5%
As of
Polled 1 h ago
Buy Yes
12¢
Sell Yes
9¢
$100 on Yes pays
$833 (8.33x)
Trade this on Polymarket
Spread: Tampa Bay Rays (-4.5)
4.5%
Polymarket 4.5%polled, 1 h 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 1 h ago
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
  • 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 81%. Next is Milwaukee Brewers O/U 1.5 at 80.5%. $5.4M 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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