MLB: Home Runs Leader

Platform comparison

Market context

The 2026 Major League Baseball regular season will conclude on 28 September, with the market resolving to the player who records the most home runs; if a tie occurs, the official leader is determined by slugging percentage, then batting average. Current crowd-implied probability for the top contender sits at 1% YES, a figure that diverges sharply from sportsbook lines where Aaron Judge leads at +350 (roughly 22%) and Shohei Ohtani follows at +400 (20%), while Kyle Schwarber holds +800 (11%) [1][2]. This discrepancy suggests prediction markets may be underweighting established power hitters compared to traditional bookmakers, despite FantasyPros projecting Judge at 47 home runs and Schwarber at 42 [4].

Historical context frames this 1% probability as unusually low for a frontrunner, given that 2025 champion Cal Raleigh entered the season at +900 odds and still secured the title, while Aaron Judge has consistently led projections with 47 expected home runs [1][4]. Traders must monitor weekly injury reports and the All-Star break performance, as struggling players typically fall out of contention by August, and late-season slumps often disqualify contenders [5]. Recent data shows Schwarber leading the league with 20 home runs as of late May, ahead of Judge and Murakami at 17, indicating early momentum that could shift odds significantly if sustained through September [3]. Health of teammates and rest schedules remain critical dependencies, as a player’s ability to maintain performance relies heavily on team health and avoiding late-season injuries [5].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews MLB: Home Runs Leader across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Kalshi vs Polymarket, which mirrors the Polymarket order book at 0% fees.

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?

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.

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.

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.