Resolution criteria on PolyGram: In the upcoming MLB game between the Arizona Diamondbacks and Colorado Rockies, scheduled for May 16 at 3:10PM ET: This market will resolve to "Arizona Diamondbacks" if the Arizona Diamondbacks win the game. This market will resolve to "Colorado Rockies" if the Colorado Rockies win the game. If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, or ends in a tie, this market will resolve 50-50. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers.
Sports outcome markets settle within hours of game-end via the UMA optimistic oracle, with the YES/NO line refreshing in real time on every meaningful in-game event. Current odds favour the NO side at 40%, making this a coinflip market with 7 days to resolution, well inside the window where catalysts move price most, backed by $618K of resting liquidity.
PolyGram is an on-chain prediction market where you trade YES or NO outcome shares with real USDC on Polygon. For this market, buy YES if you believe the event will happen, or NO if you think it won't. Your maximum loss is your stake — winning shares pay $1.00 each at resolution. Unlike sportsbooks, there is no house edge: prices are set by supply and demand from other traders and reflect the crowd's real-time probability.
Market outcomes
| Arizona Diamondbacks vs. Colorado Rockies | 40% YES | 60% NO |
| NRFI | 100% YES | 0% NO |
| Spread -3.5 | 13% YES | 87% NO |
| Spread -2.5 | 20% YES | 81% NO |
| Spread -1.5 | 33% YES | 68% NO |
| Spread -2.5 | 18% YES | 83% NO |
| Spread -3.5 | 11% YES | 90% NO |
| Spread -4.5 | 8% YES | 93% NO |
The Arizona Diamondbacks and Colorado Rockies are scheduled to play at Coors Field, with the market currently pricing Arizona at 35% on Polymarket’s order book. That implies the crowd is giving Colorado the clearer chance at home, which is consistent with how this fixture has been treated in recent seasons: Coors Field tends to narrow the gap between stronger and weaker clubs, while the Rockies’ home games often produce volatile prices because run environment and late scoring swings matter more than overall records. Recent head-to-head results have not been one-sided enough to anchor a heavy favourite, including Colorado’s 6-5 win over Arizona in Denver in August 2025, but Arizona also beat Colorado 5-3 later that summer, underlining the matchup’s dependence on lineups and pitching rather than brand strength alone.
For traders, the main catalysts are starting pitcher confirmations, late lineup changes and any weather or postponement risk, because those can move both the win price and the total on the same order book. Coors Field games are especially sensitive to bullpen availability and day-of hitting scratches, since thin air and carry can turn marginal edges into high-scoring variance. If either club rests regulars or announces an unexpected opener, the implied probability can shift quickly; conversely, a stable Arizona line-up against a weakened Colorado staff would tend to push the market above the current 35% level.
This market settles from the official outcome published at https://www.mlb.com/. A proposer submits the final result to the UMA optimistic oracle on Polygon; the two-hour dispute window closes and payouts clear in USDC.
For this market, the resolution date is 23 May 2026. A UMA proposer can submit the outcome from that moment; the two-hour dispute window closes at , and assuming no counter-claim is staked, winning USDC clears to trader balances by approximately .
If a dispute is filed inside the two-hour window, the outcome escalates to UMA token-holder voting, which extends settlement by roughly 48 hours. Disputed resolutions are rare — fewer than 0.5% of PolyGram markets in 2026 to date — and even rarer for events with clear, verifiable resolution sources.
Funds clear directly to your in-app USDC balance on Polygon. From there, withdrawals are non-custodial: send to any address you control, typical confirmation under 30 seconds, gas paid in USDC if you'd rather not hold MATIC.
Minimum order size on PolyGram is $1.00, with no maximum cap aside from available book depth. Orders route into Polymarket's on-chain CLOB on Polygon; the matching engine pairs YES buyers with NO buyers atomically — every executed trade is settled on-chain with no counterparty risk.
The trade ticket includes a slippage box (default 2%, configurable 0.1%-10%) that caps the worst-case entry price. Your maximum loss is your stake — winning YES (or NO) shares pay $1.00 each at resolution. Your slippage tolerance and the depth of resting limit orders determine the actual fill.
PolyGram charges 0% house edge — no spread mark-up, no rake on winnings, no withdrawal fees beyond network gas. The platform earns exclusively from optional features (copy-trade boosts, advanced order types, the yield vault on idle USDC); the trading surface itself is at-cost.
The mechanics for trading "Arizona Diamondbacks vs. Colorado Rockies" are the same as any other PolyGram event contract. Each YES share resolves to $1 if the event happens, or $0 if it doesn't. The current price between 0¢ and 100¢ is the market's probability estimate, set live by the order book.
$938K in lifetime turnover and $618K of resting liquidity puts this market in the top 2% by volume for games contracts on PolyGram. Order-book depth is exceptional — among the deepest order books in the category.
Last 24 hours alone saw $937K in turnover, well above the lifetime daily-average for this market — a clear sign of news catalysing trader activity right now.
The market has been open for under a month — fresh enough that information asymmetry remains a real factor.
Higher-volume markets tend to have tighter spreads and faster price discovery — meaning the displayed YES/NO percentages are more likely to reflect the true crowd-implied probability rather than a single trader's directional view.
Resolution is sourced from https://www.mlb.com/. Settlement is executed by the UMA optimistic oracle on Polygon, with a 2-hour dispute window before payouts clear.
This prediction market is scheduled to close on 23 May 2026. After the resolving event occurs, settlement typically clears within 24 hours once the UMA optimistic oracle confirms the outcome. All payouts are in USDC on the Polygon network.
To trade on this prediction market, create a free PolyGram account at polygram.ink, deposit USDC via Polygon, and place a YES or NO order on the outcome you believe in. You can learn more on our how-it-works page. Your maximum loss is limited to your stake — there is no leverage or margin.
When the outcome is determined, winning YES shares pay out $1.00 each in USDC, while losing shares pay $0. Settlement is handled by the UMA optimistic oracle on Polygon — a proposer submits the result, a two-hour dispute window opens, and if uncontested, payouts are distributed automatically. You can withdraw your winnings to any Polygon wallet.
Prediction-market positions can lose 100% of staked capital. Outcomes are uncertain by definition — historical accuracy of crowd-implied probabilities is high in aggregate but not for any single market. PolyGram does not provide investment advice. Trade only with capital you can afford to lose.
Regulatory status varies by jurisdiction. Germany, the United States, and most EU countries treat Polymarket-style event contracts under one of three frameworks: financial derivative, gambling product, or unregulated novel asset. Consult local counsel before trading.
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