MLB: RBIs Leader

Platform comparison

Market context

The market bets on which player accumulates the most runs batted in during the 2026 Major League Baseball regular season, with settlement determined by official MLB leader rules and home-run tiebreakers. Current crowd-implied probability for the YES outcome sits at 9%, yet sportsbooks heavily favour New York Yankees slugger Aaron Judge, assigning him +450 odds that imply an 18.18% chance of leading the majors [1][2]. This divergence suggests prediction-market traders are either underweighting Judge’s projection or betting on a different frontrunner, as FanGraphs systems project Judge to top RBIs across all models [1].

Historically, RBI leaders often emerge from late-season surges rather than early dominance, with contenders like Cal Raleigh and Kyle Schwarber leading in 2025 before Judge took the 2026 favourite spot [2]. Past cases show that players who slump in August or suffer late injuries rarely retain league-leading status, making health and consistency through September critical [3]. The 9% implied probability appears conservative compared to the 18% sportsbook line, hinting at a potential mispricing if Judge maintains his projection.

Traders should monitor All-Star break performance, injury reports, and lineup stability, particularly for Judge and Orioles slugger Pete Alonso, who holds +900 odds [1]. Recent analysis highlights that struggling players fall out of contention post-All-Star, while healthy power hitters with strong team run-support gain ground [3]. With the settlement window closing in late September 2026, watch for mid-August updates on roster moves and batting trends, as these often dictate final RBI totals [3].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Kalshi vs Polymarket, which mirrors the Polymarket order book directly.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Kalshi vs Polymarket. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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'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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Kalshi vs Polymarket trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.