Trade: MLB: 4-homer game in 2026?
Resolution criteria on PolyGram: This market will resolve to “Yes” if any player hits four or more home runs in a single game during the 2026 MLB regular season. Otherwise, this market will resolve to “No”. Four home runs by a player in any length regular season game will count toward resolution. Inside-the-park home runs will count toward a “Yes” resolution for this market. If the 2026 MLB regular season is cancelled, postponed after October 11, 2026, 11:59 PM ET, or if it cannot be determined if a player hit four home runs in a single game within that timeframe, this market will resolve to “No”.
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.
- Liquidity
- $324
- Total Volume
- $3
- 24h Volume
- —
- Open Interest
- $3
Market outcomes
| MLB: 4-homer game in 2026? | 56% YES | 44% NO |
Market context
The question centres on whether any Major League Baseball player will hit four or more home runs in a single regular season game during 2026. This remains an exceptionally rare occurrence in professional baseball. Only 18 players have achieved this feat since 1900, with the most recent instance being J.D. Martinez's four-homer game in 2017. The 162-game season provides 2,430 total games across all teams, yet the combination of pitcher quality, ballpark dimensions, and individual performance variance makes the event statistically improbable in any given year.
The current 56% implied probability on Polymarket's order book reflects meaningful uncertainty about whether 2026 will buck historical trends. The baseline expectation—roughly one four-homer game per 6–7 seasons across MLB history—would suggest odds closer to 15–20% for any single season. The elevated probability may incorporate expectations around roster composition, potential rule changes affecting ball carry distance, or simply the natural variance in prediction markets where traders price in tail-risk scenarios.
Traders should monitor off-season roster moves and any announcements regarding ball specifications or ballpark modifications ahead of the 2026 season. The schedule's distribution across parks with varying home-run-friendly dimensions matters; players on teams with frequent games in high-altitude or smaller-outfield venues carry marginally higher probability. Injury developments to established power hitters through spring training and early season performance will provide clearer signals about whether conditions favour such an extreme outcome.
Wikipedia Context
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MLB Home Run Derby XMLB Home Run Derby X is a global baseball tour operated by Major League Baseball (MLB). Its first edition was in 2022. It is based on the Home Run Derby that is usually contested the day before the MLB All-Star Game.
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List of Major League Baseball home run records
This is a list of some of the records relating to home runs hit in baseball games played in the Major Leagues. Some Major League records are sufficiently notable to have their own page, for example the single-season home run record, the progression of the lifetime home run record, and the members of the 500 home run club. A few other records are kept on sep
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MLB Network Radio
MLB Network Radio is an American sports talk radio station on Sirius XM Radio that features Major League Baseball related talk shows, as well as archives and live reports about live game action, along with other baseball leagues and teams worldwide.
How this market resolves
Resolution is handled by the UMA optimistic oracle on Polygon. A proposer submits the outcome, a two-hour dispute window opens, and if no one stakes a counter-claim the payout is final. Contested outcomes escalate to UMA token-holder voting. Payouts clear in USDC to the winning side.
How to trade this market step by step
The mechanics for trading "MLB: 4-homer game in 2026?" 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.
- Sign in on polygram.ink with your email — no full KYC under $1,500 lifetime trading volume.
- Deposit USDC on Polygon (lowest fees, ~$0.01 per transaction) or Ethereum. Funds credit after 12 confirmations.
- Pick a side. Buy YES if you believe the event will happen; buy NO if you think it won't. The current YES price reflects the market's collective probability.
- Size your position. If you stake 100 USDC at 56% YES, you'll receive shares that pay $179 if YES resolves true — a 79% gross return. If NO resolves, your shares are worth $0.
- Set risk controls (optional). Stop-loss, take-profit, and limit-order types all supported. Use the trade ticket's slippage box to cap your maximum entry price.
- Wait for resolution. When the event resolves on-chain via the UMA optimistic oracle, the winning side settles to 100¢ automatically and USDC hits your balance within seconds. Withdrawable to any wallet you control.
How active is this market?
$3 in lifetime turnover and $324 of resting liquidity puts this market in the below the median by volume for baseball contracts on PolyGram. Order-book depth is thin — large orders may need to be split across the book or executed as limit orders.
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.
Key terms
- YES / NO share
- A binary outcome token that pays $1.00 if the underlying claim resolves true (YES) or false (NO), and $0 otherwise. The market price between 0¢ and 100¢ is the implied probability.
- CLOB
- Central limit order book. The matching engine that pairs YES buyers with NO buyers (effectively the same trade). Polymarket's CLOB on Polygon executes trades on-chain via the conditional-tokens framework.
- Liquidity
- USDC capital sitting in resting limit orders inside the order book. Deeper liquidity means smaller slippage on large trades and a tighter bid-ask spread.
- UMA optimistic oracle
- The on-chain dispute system that settles each Polymarket market. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution.
- Slippage
- The difference between the displayed mid-price and your fill price. Affects market orders most; limit orders avoid slippage but may take time to fill.
- Conditional token
- ERC-1155 outcome share issued by Gnosis Conditional Tokens on Polygon. The token type that resolves to $1.00 or $0.00 at settlement.
Frequently asked questions
What is the current probability for "MLB: 4-homer game in 2026?"?
As of today, traders on Polymarket price this outcome at 56%. The number updates continuously as the order book clears. PolyGram mirrors the same live odds with locale-aware formatting and USDC settlement.
How does this market resolve?
Resolution is handled by the UMA optimistic oracle on Polygon. A proposer submits the outcome, a 2-hour dispute window opens, and if uncontested the payout is final. Contested outcomes escalate to UMA token holders.
When does this market close?
This prediction market is scheduled to close on 28 September 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.
How can I trade on "MLB: 4-homer game in 2026?"?
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.
What happens when the market resolves?
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.
Risk and regulatory note
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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