Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
PolyGram Pick polygram.ink |
52% | 48% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open on PolyGram → |
Polymarket polymarket.com |
52% | 48% | 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
| Seattle Mariners vs. Kansas City Royals | 52% YES | 49% NO |
| NRFI | 47% YES | 54% NO |
| Spread -1.5 | 40% YES | 61% NO |
| O/U 8.5 | 47% YES | 54% NO |
| Spread -3.5 | 14% YES | 86% NO |
| Spread -2.5 | 21% YES | 79% NO |
Market context
The Mariners and Royals meet in Kansas City on Friday night, with the market currently leaning slightly towards Seattle at 52% YES. In comparable one-game baseball markets, a mid-50s price usually reflects a tight margin rather than a strong read: small changes in starting pitching, bullpen availability, or late lineup news can move the fair value more than season-long records do. That makes this kind of line more sensitive to the listed starters and to any pre-game rest decisions than to broad team reputation alone.
The most important catalyst is the confirmed pitching matchup and any late changes to the batting orders or bullpen usage after Thursday’s games. Recent preview coverage has framed the contest as a low-scoring, close-run game, with Kansas City’s case resting on a run-line profile rather than a dominant moneyline edge, while Seattle is being treated as a modest road favourite in the market. Traders should watch official lineup cards and any note on pitcher workload or late scratch news, because those are the variables most likely to justify a move away from the current near coin-flip pricing.
Methodology
Political prediction markets differ structurally from sports betting: thinner liquidity, longer settlement windows, higher sensitivity to single news events. This page shows the live Polymarket quote for Seattle Mariners vs. Kansas City Royals plus platform attributes for the three reference venues, so you can see at a glance where the deepest market for this question sits.
Resolution & payout
For political markets the resolution source is decisive. Polymarket defines a concrete source per contract (e.g. AP, Reuters, official electoral commission) and uses the UMA Optimistic Oracle as the on-chain dispute mechanism. With a clearly defined outcome the USDC payout lands within minutes of the final confirmation.
FAQ
- Is this market available outside the US?
- PolyGram is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.
- 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 does it cost to trade on PolyGram?
- Zero. PolyGram routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.
- 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.
- 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.
Trade Seattle Mariners vs. Kansas City Royals on PolyGram
Live order book, 0% fees, USDC settlement in seconds.
Trade on PolyGram →