MLB: AL Rookie of the Year

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Active sub-markets

Market context

The 2026 MLB season will crown a rookie of the year in the American League following voting by the Baseball Writers' Association of America. The award recognises the most valuable first-year player across the league's thirty teams, with voting typically concluded by early November and results announced shortly thereafter. At 4% implied probability, the market reflects significant uncertainty about which prospect will emerge as the standout contributor during their debut campaign.

Historical voting patterns show the award concentrates on players who combine offensive production with playing time and team visibility. Since 2015, winners have averaged roughly 140 games played and contributed measurably to playoff-contending rosters. The 2025 voting cycle will provide the most recent comparable data; tracking which rookies receive votes and their statistical profiles helps calibrate expectations for 2026 contenders. A trader monitoring farm system rankings and prospect evaluations across MLB organisations can identify candidates likely to debut in 2026, then cross-reference their projected roles against historical thresholds for award consideration.

Programmatically, the key dependency is the MLB schedule confirmation and injury reports throughout 2026. Conditional orders tied to prospect call-up announcements—particularly for top-ranked prospects from organisations with competitive rosters—offer a mechanism to adjust positions as the season unfolds. The voting window closes in early November 2026, creating a natural deadline for information gathering. Tracking mid-season performance metrics and comparing them against prior-year voting distributions will inform position adjustments closer to the resolution date.

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

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

Where can I trade this market with the lowest fees?

On PolyGram, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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.

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.