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Houston Astros vs. San Diego Padres

How the prediction-market book is pricing "Houston Astros vs. San Diego Padres" right now, with a side-by-side platform comparison and zero-fee CTAs.

1st 5 Innings O/U 2.5 100% 1st 5 Innings O/U 3.5 85% O/U 6.5 75% 1st 5 Innings O/U 4.5 74% Volume: $979K Liquidity: $878K Closes: 17 Aug 2026
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Houston Astros vs. San Diego Padres

Platform comparison

PlatformYES oddsNO oddsFeeKYCSettlement
Polymarket (via Who Will Win) Pick
polygram.ink (preferred broker)
100% 0% 0% (USDC on-chain) No-KYC up to $1,500 USDC, auto via UMA oracle Live odds →
Polymarket (direct)
polymarket.com
100% 0% 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 2.5100%
1st 5 Innings O/U 3.585%
O/U 6.575%
1st 5 Innings O/U 4.574%
Houston Astros vs. San Diego Padres62%
O/U 7.561%
1st 5 Innings O/U 6.559%
O/U 8.550%
1st 5 Innings Spread -1.550%
1st 5 Innings Spread -1.550%
Extra Innings48%
Spread -1.545%
O/U 9.536%
1st 5 Innings O/U 5.533%
Spread -2.532%
O/U 10.528%
Spread -1.520%
Spread -2.512%
NRFI0%

Market context

The Astros-Padres game is priced with the **Astros as a slight favourite**, with the market’s 59% YES implying Houston should win a little more often than not. That sits in line with the broader pre-game picture: ESPN listed San Diego as only a small moneyline favourite at -111 before the scheduled August 9 start, while the teams came in with near-identical records and split recent form across the two games already played in San Diego.[3][12]

Recent results matter here because they show a tight, low-margin series rather than a clear class gap. The Padres beat Houston 3-2 on August 8 after the Astros took the August 7 game 6-3, and the clubs entered the finale separated by only one game in the standings.[1][8] Houston’s road record was 30-29 and San Diego’s home record 33-26, which supports a fairly balanced handicap rather than a heavy favourite, so a 59% implied probability looks broadly fair with only modest room for mispricing.[1][3]

For traders, the key catalyst is simply whether the announced starters and line-up cards confirm the market’s baseline, because a late pitching change can move a game like this more than the team records do. ESPN’s pre-game listing already showed San Diego around -111, so any drift away from that range would usually come from rotation, rest, or lineup news rather than a new form signal.[3] The only clear contrarian angle is that the Padres had just won the previous night at home, which can sometimes leave a slightly stronger public lean on the fresher-looking side even when the underlying price is close.[1][2]

Sources: 1 · 2 · 3 · 4 · 5

Live Data & Statistics

The Polymarket order book prices 1st 5 Innings O/U 2.5 at 100% for "Houston Astros vs. San Diego Padres".

1st 5 Innings O/U 2.5 100% Other 0%

Live stats load when the match begins. Current market odds are shown above. Trading volume: $979K.

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Who Will Win, which mirrors the Polymarket order book directly.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

UK Frequently Asked Questions

Where can I trade this market with the lowest fees?
Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Who Will Win. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.
Is this market available outside the US?
Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.
Is Polymarket legal in the UK?
Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.
Do I pay tax on prediction market profits in the UK?
UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.
How do I deposit on Polymarket from the UK?
UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.
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Related Topics

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