Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
PolyGram Pick polygram.ink |
33% | 67% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open on PolyGram → |
Polymarket polymarket.com |
33% | 67% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open on PolyGram → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open on PolyGram → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open on PolyGram → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open on PolyGram → |
Live odds for Polymarket-based markets come from the Polygon order book. Non-Polymarket venues show attributes only; clicking any row opens the market on PolyGram.
Active sub-markets
| Spread -2.5 | 33% YES | 68% NO |
| Spread -3.5 | 24% YES | 77% NO |
| Spread -4.5 | 17% YES | 84% NO |
| Spread -1.5 | 28% YES | 73% NO |
| Spread -2.5 | 17% YES | 83% NO |
| Spread -3.5 | 12% YES | 88% NO |
Market context
The Atlanta Braves host the Miami Marlins in an MLB game on 21 May at 6:40 pm ET, and the market’s 33% implied probability points to Miami as the outsider despite Atlanta having just won 9-1 on Wednesday night. That result followed a seven-inning, one-run outing from Chris Sale and home runs from Austin Riley and Dominic Smith, which is the sort of recent form that often pulls short-dated money towards the home side. For comparison, published pre-game previews for this series had Atlanta around a low-60s implied win chance and an 8.5 total, so the current price is materially softer than the most recent head-to-head framing suggests.
For traders, the main things to watch are line-up confirmation, any late pitching change, and whether the game opens with enough liquidity to absorb funding frictions. On markets like this, depth often improves when deposits clear quickly through cards or bank rails, but slower on-ramp methods can delay entries and leave spreads wider around first pitch. Withdrawals also matter for turnover: SEPA and USDC tend to support faster recycling of funds than card withdrawals or slower bank settlement, which can affect how aggressively participants add size into a live baseball market. ESPN’s recap of the series opener is the clearest recent source on the immediate form signal, while official team and league line-ups will matter most once they are posted closer to game time.
Methodology
This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to PolyGram, which mirrors the Polymarket order book directly.
Resolution & payout
Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.
Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.
FAQ
- How does resolution work?
- Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.
- What's the difference between YES and NO shares?
- A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.
- How fast are USDC deposits?
- Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.
- Do I need to KYC for this market?
- Not under $1,500 of lifetime trading volume. Above that threshold, PolyGram triggers a quick verification flow that finishes in minutes.
- How reliable are the quoted odds?
- The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.
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