MLB: RBIs Leader

Platform comparison

Market context

The 2026 MLB regular season is nearing its conclusion, with just 85 days remaining to determine which player accumulates the most runs batted in. Historical data shows that league-leading RBI races often tighten significantly after the All-Star break, as struggling contenders fall away and consistent performers separate themselves [1]. In previous seasons, favourites like Aaron Judge held strong odds early but faced late-season volatility due to injury risks or slumps, while longshots only succeeded when multiple top candidates faltered [1][2]. The current crowd-implied probability of 9% YES for the leading candidate, Yordan Alvarez, reflects a wide-open field where no single name dominates consensus, mirroring the unpredictability seen when Kyle Schwarber and Cal Raleigh led the previous year [3][5].

Traders should monitor post-All-Star performance trends, late-season injury reports, and lineup stability, as these factors heavily influence RBI accumulation [1]. Recent odds from traditional books still favour Judge at +450, implying an 18% probability, creating a stark contrast with the prediction market’s fragmented pricing [2][3]. The value likely sits with Alvarez at 9% if he maintains his current pace, while contrarian angles may emerge if a top favourite like Judge or Ohtani suffers a setback [5][6]. With $1.4M already traded across 1,433 positions, the market remains highly sensitive to new information that shifts conviction [5]. Watch for any announcements regarding rest schedules or health updates as the season enters its final stretch, as these will dictate the final leaderboard.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track MLB: RBIs Leader across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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 Who Will Win 2026. 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.

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.