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Pronóstico: Seattle Mariners vs. Houston Astros

How the prediction market is pricing "Pronóstico: Seattle Mariners vs. Houston Astros" right now — Polymarket mid plus comparison with Betfair and Manifold.

1st 5 Innings O/U 2.5 69% 1st 5 Innings O/U 3.5 54% O/U 7.5 54% Seattle Mariners vs. Houston Astros 47% Volume: $128K Liquidity: $1.8M Closes: 23 Aug 2026
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Pronóstico: Seattle Mariners vs. Houston Astros

Platform comparison

PlatformYES oddsNO oddsFeeKYCSettlement
Polymarket (via Mundial 2026 Grupos) Pick
polygram.ink (preferred broker)
69% 31% 0% (USDC on-chain) No-KYC up to $1,500 USDC, auto via UMA oracle Live odds →
Polymarket (direct)
polymarket.com
69% 31% 0% Geo-blocked in US/UK/EU USDC, on-chain Live odds →
Kalshi
kalshi.com
Up to 7% per trade US-only, KYC required USD Live odds →
Betfair Exchange
betfair.com
2-5% commission Full KYC from first trade GBP / EUR Live odds →
Manifold Markets
manifold.markets
Play-money (mana) None — play-money Mana (no cash-out) Live odds →

Outcome probabilities

Current market-implied probability for each outcome, from the live order book.

OutcomeProbability
1st 5 Innings O/U 2.569%
1st 5 Innings O/U 3.554%
O/U 7.554%
Seattle Mariners vs. Houston Astros47%
NRFI47%
O/U 8.546%
1st 5 Innings O/U 4.540%
Spread -1.536%
O/U 9.535%
Spread -1.534%
1st 5 Innings O/U 5.532%
1st 5 Innings Spread -1.531%
Spread -2.527%
1st 5 Innings Spread -1.526%
Spread -2.525%
1st 5 Innings O/U 6.523%
Extra Innings9%

Market context

The Seattle Mariners and Houston Astros meet in a divisional game on 16 August, with the market sitting near a coin-flip at 47% for Seattle. That looks in step with a matchup where the gap is shaped more by availability than by reputation: Seattle are carrying a cluster of absences, including J.P. Crawford, Luke Raley, Matt Brash, Cole Wilcox and Carlos Vargas, while Houston are also missing Carlos Correa, Brice Matthews and Mike Burrows, with Brandon Walter out long term.[11][9]

The head-to-head backdrop does not suggest a runaway either way. Houston edged Seattle 10-7 in the previous meeting on 14 August, and recent game logs show this series has already produced high-scoring swings rather than a clean pitching edge; Seattle’s line-up sheet for 16 August was still listed as TBD close to first pitch, which leaves the final shape of both line-ups and any late scratch decisions as the main near-term variables.[3][8][6]

For traders, the key catalysts are the confirmed batting orders, whether Taylor Ward is in after being listed probable for 16 August, and whether Houston can keep enough everyday bats on the field despite the Correa absence and Matthews’ knee issue.[7][9] Hunter Brown is the likely Houston starter and has been working at a mid-3s ERA level, so any late change to Seattle’s order or Houston’s pitching plan would matter more than the crowd-implied 47% baseline suggests.[6][12]

Sources: 1 · 2 · 3 · 4 · 5

Live Data & Statistics

The Polymarket order book prices 1st 5 Innings O/U 2.5 at 69% for "Pronóstico: Seattle Mariners vs. Houston Astros".

1st 5 Innings O/U 2.5 69% Other 31%

Live stats load when the match begins. Current market odds are shown above. Trading volume: $128K.

Methodology

Football-specific comparison page for Pronóstico: Seattle Mariners vs. Houston Astros. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi (US-focused) or Manifold (play-money).

Resolution & payout

Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.

FAQ

Are prediction markets better than sports betting?
Prediction markets tend toward tighter odds than bookmakers because they use peer-to-peer exchange rather than bookmaker margin. On major matches, Polymarket quotes typically sit 2-5% closer to the true probability model than bet365 or DraftKings.
Can I bet on individual matches?
Yes, Polymarket lists every major Premier League / Champions League / World Cup match as its own market. Liquidity varies — top matches like El Clásico or a semi-final often have six-figure pools, lower-league games closer to three-figure.
What are live sports odds on Polymarket?
Some top-tier matches stay open during play — you can trade the half-time probability in the 70th minute. Polymarket mid-prices update second-by-second; any frontend mirroring the order book shows the same movement.
Which sports markets are available?
Football (soccer) dominates — Champions League, World Cup, Premier League, La Liga, Bundesliga — followed by NFL, NBA, tennis Grand Slams, Formula 1, boxing/MMA. Resolution via official league source confirmation.
What's the difference between match odds and outright odds?
Match odds cover a single game ("Bayern beats BVB"). Outright odds are long-term aggregates ("Bayern wins the league"). Outright markets have deeper liquidity; match markets have faster resolution.
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Trade Pronóstico: Seattle Mariners vs. Houston Astros on Mundial 2026 Grupos

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