MLB: Stolen Bases Leader

Platform comparison

Active sub-markets

Market context

The 2026 Major League Baseball regular season is currently underway, with Nasim Nuñez leading the stolen bases count at 31, followed closely by Bobby Witt Jr. at 28, as the market seeks the player who will finish with the most steals by September 28, 2026 [4][5]. This 8% implied probability for a specific outcome reflects the volatility inherent in speed-based statistics, where historical leaders like Rickey Henderson’s career record of 1,406 steals demonstrate that single-season totals can fluctuate wildly based on health and opportunity [1]. In comparable seasons, the stolen base leader has often been a surprise, with projections from FantasyPros suggesting Elly De La Cruz and Chandler Simpson could reach 41 steals, yet the current leader’s pace is not guaranteed to hold through the final weeks [7].

Traders must monitor injury reports and lineup changes, particularly for Nuñez and Witt Jr., as a single missed game could shift the leader significantly, while also watching for late-season roster moves that might introduce new speed threats [3]. Recent coverage from ESPN highlights the tight race between the top contenders, noting that the margin is thin enough that a caught stealing or a minor injury could alter the final standings [4]. Platform comparisons reveal key divergences: Polymarket often uses decimal odds versus Kalshi’s implied probability format, while fee structures vary significantly between Betfair’s commission model and Smarkets’ zero-fee approach, impacting the net return on this volatile market [2]. Additionally, KYC requirements differ, with some books demanding full identity verification while others offer lighter access, a factor that influences trader participation in this specific speed-based prediction.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares MLB: Stolen Bases Leader specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. Live odds come from the Polymarket order book; the other venues' contract details are maintained manually because their APIs aren't directly comparable. Every CTA routes to PolyGram, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). PolyGram routes every trade directly into Polymarket's on-chain settlement, which is why payouts land fastest.

FAQ

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'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 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 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.