Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Who Will Win) Pick polygram.ink (preferred broker) |
78% | 22% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
78% | 22% | 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.
| Outcome | Probability |
|---|---|
| 1st 5 Innings O/U 2.5 | 78% |
| 1st 5 Innings O/U 3.5 | 66% |
| San Diego Padres vs. Arizona Diamondbacks | 56% |
| 1st 5 Innings O/U 4.5 | 54% |
| NRFI | 53% |
| O/U 8.5 | 52% |
| Spread -1.5 | 44% |
| 1st 5 Innings O/U 5.5 | 43% |
| O/U 9.5 | 40% |
| 1st 5 Innings Spread -1.5 | 34% |
| O/U 10.5 | 34% |
| Spread -2.5 | 33% |
| 1st 5 Innings O/U 6.5 | 31% |
| Spread -1.5 | 30% |
| 1st 5 Innings Spread -1.5 | 27% |
| Spread -2.5 | 21% |
| Extra Innings | 8% |
Market context
San Diego Padres vs Arizona Diamondbacks opens with the market effectively pricing the home side as a narrow favourite: the crowd-implied probability is **56% YES** for San Diego, which leaves Arizona as the slight underdog. ESPN’s live game listing for 5 August had Arizona around **58%** and San Diego around **42%**, so the market is sitting a little against the scoreboard consensus rather than chasing it.[1]
The recent head-to-head form has been mixed enough to justify a modest price rather than a strong one. Arizona beat San Diego **5-1** on 3 August, but the clubs have also split or swung tightly in earlier meetings, including a **3-1** Diamondbacks win on 9 July and a Padres win in the same stretch.[18][12][4][5] At a broader level, the matchup has tended to produce uneven results rather than a clean home-edge pattern, which makes a small favourite line more defensible than a major one.[2][5]
For traders, the main catalysts are starting pitcher confirmations, late lineup scratches, and any change to the run environment at Chase Field, because the game is already being framed around a relatively modest total of **9** with San Diego priced near **-124** on the moneyline in one live market.[3] Arizona’s stronger home record, **27-20**, is the clearest counterweight to the Padres’ slightly better away mark, **21-24**, so contrarian value would usually sit with the underdog if lineups favour Arizona’s offence or if San Diego is missing regulars.[1]
Live Data & Statistics
Live stats load when the match begins. Current market odds are shown above. Trading volume: $386K.
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%.
Trade San Diego Padres vs. Arizona Diamondbacks on Who Will Win
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