MLB: Runs Leader

Platform comparison

Market context

The contract resolves on which player accumulates the most runs during the 2026 Major League Baseball regular season, a statistic driven by team offensive output rather than individual power alone. With a crowd-implied probability of 24% for the current favourite, the market suggests a competitive field where a single breakout season could shift the leader rapidly.

Historically, runs leaders often emerge from high-octane teams like the Yankees or Dodgers, who currently top the league in total runs with 121 and 113 respectively[5]. Unlike home run titles, which frequently crown power hitters like Kyle Schwarber or Aaron Judge who lead the league in that category as of May 25[1], runs require consistent line-up placement and team scoring opportunities. Past seasons show that longshots rarely win unless multiple favourites suffer injuries, a pattern that mirrors the current 24% valuation which implies significant uncertainty about who will hold the top spot by the September settlement window.

Traders must monitor mid-season injury reports and All-Star break roster changes, as a single player's absence can dismantle a runs accumulation streak. Recent analysis on MLB player performance futures highlights that tracking contenders from the All-Star break onwards is critical, as struggling players fall out of contention while hot hitters overtake them[2]. Additionally, the divergence between sportsbook lines favouring power hitters for home runs and the prediction market's focus on runs creates a unique arbitrage opportunity, particularly if a contact hitter from a top-scoring team like the White Sox (115 runs)[5] begins to dominate the leaderboard.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews MLB: 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

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?

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.

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 Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

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.

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.