Pronóstico: MLB: NL Rookie of the Year

Platform comparison

Active sub-markets

Market context

The 2026 National League Rookie of the Year award will be decided by the player who delivers the most outstanding debut season for an NL team, with current market sentiment heavily favouring a specific outcome at 58% probability. Historical precedents for NL rookies show that first-round picks who secure immediate playing time and post an OPS above 0.800 by mid-season often dominate the race, yet the volatility of early polls can mislead traders. Nolan McLean currently leads the first official poll with 23 votes, while Sal Stewart holds six, indicating a tight contest where a single injury or slump could drastically shift the implied probability away from the current favourite.

Traders must monitor the St Louis Cardinals' roster decisions regarding JJ Wetherholt, who currently holds the odds-on position at -150, and watch for any updates on Sal Stewart's cooling May performance, where his OPS dipped below 0.700 before a recent resurgence. Recent polling data from MLB confirms McLean's early dominance, but Stewart's 12 homers and 36 RBIs remain a compelling counter-narrative that could sway voters if his late-season form continues [5][4]. Key catalysts include the Pirates' handling of Konnor Griffin's power output, which remains limited despite a strong batting average, and any potential suspensions or injuries that could remove top contenders before the December settlement window closes.

Sources: 1 · 2 · 3 · 4 · 5

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

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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.

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 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.