Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Sport Prediction) Pick polygram.ink (preferred broker) |
80% | 20% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
80% | 20% | 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 | 80% |
| 1st 5 Innings O/U 3.5 | 66% |
| 1st 5 Innings O/U 4.5 | 56% |
| O/U 8.5 | 55% |
| NRFI | 49% |
| Chicago White Sox vs. Boston Red Sox | 45% |
| 1st 5 Innings O/U 5.5 | 44% |
| O/U 9.5 | 44% |
| Spread -1.5 | 38% |
| O/U 10.5 | 37% |
| Spread -1.5 | 34% |
| 1st 5 Innings Spread -1.5 | 34% |
| 1st 5 Innings O/U 6.5 | 32% |
| 1st 5 Innings Spread -1.5 | 28% |
| Spread -2.5 | 28% |
| Spread -2.5 | 25% |
| Extra Innings | 8% |
Market context
The White Sox and Red Sox meet again in a series that has already swung on short bursts of form rather than season-long consistency. Boston has taken the more recent edge head-to-head, beating Chicago 5-0 and 8-1 in early July, and ESPN’s game log shows the Red Sox entering those meetings on a stronger run than the White Sox[1][4][12]. That matters for a market sitting near 45%: it is close enough to a coin flip that recent momentum and matchup-specific pitching tend to move the price more than overall record alone. Chicago’s better home record and slightly stronger run differential have kept it live in individual games, but Boston’s recent results have been the more convincing signal in this pairing[11][1].
The main catalysts are likely to be lineup availability, the starting pitching announcement, and any late roster moves before first pitch. Boston’s 2026 season page shows the club was already active around the deadline, including the 3 August acquisition of Adley Rutschman, which could alter the shape of the order if he is in the lineup[19]. On the field, Boston’s recent stretch has been notably stronger, with AP via CBS Sports reporting wins in five straight and 10 of 12 at one point, which is the kind of run that can justify a live price above a strict 50-50 read if the market expects it to continue[4]. Chicago’s side is more dependent on whether its recent home production holds up and whether any key absences narrow the gap; those details usually matter more here than broad standings because the teams have already shown they can trade lopsided results within the same series[1][11].
Live Data & Statistics
Live stats load when the match begins. Current market odds are shown above. Trading volume: $91K.
Methodology
Sports-specific comparison page for Chicago White Sox vs. Boston Red Sox. 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 or Manifold.
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
- When do sports markets resolve?
- Typically within hours of the official final whistle. Polymarket uses UMA Optimistic Oracle with source URLs pointing at official league data feeds — e.g. the Premier League for EPL markets, UEFA for Champions League, FIFA for World Cup.
- 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.
- How fast do sports winnings settle?
- Once the official league outcome is logged in the UMA Oracle (typically 1-2 hours after the final whistle), Polymarket's smart contract triggers USDC payout. To your wallet within minutes.
- 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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