MLB: Stolen Bases Leader

Platform comparison

Active sub-markets

Market context

The underlying event is the player who accumulates the highest number of stolen bases during the 2026 Major League Baseball regular season, with Nasim Nuñez currently leading the league with 31 steals as of mid-June[1][4]. Historical patterns in stolen base leadership show that early-season totals often compress by September, yet the top contenders typically maintain a narrow margin throughout the campaign. The current 8% crowd-implied probability reflects the market’s assessment that Nuñez’s lead is vulnerable, given that Bobby Witt Jr. trails by only three steals and has a higher ceiling for late-season acceleration[1][2]. In comparable seasons, leaders have frequently been overtaken after the All-Star break due to roster changes, injury recoveries, or strategic shifts in team pace, making the 8% figure a plausible but cautious valuation of the incumbent’s hold.

Traders should monitor upcoming lineup announcements, pitch counts, and defensive alignments, as these directly influence stolen base opportunities. Key catalysts include the return of injured speedsters like Elly De La Cruz, who is projected to lead the league with 41 steals if healthy[6], and any managerial changes that prioritise aggressive base-running. Recent reports from FOX Sports confirm that Witt Jr. has increased his steal attempts in the last ten games, suggesting a tactical shift that could narrow the gap further[2]. Programmatically, this market would be approached by scraping real-time MLB stats feeds, applying conditional orders based on projected steal rates, and using bots to execute trades when Nuñez’s steal count stagnates while Witt Jr.’s accelerates. The settlement window ending 28 September 2026 provides ample time for late-season volatility to reshape the leaderboard.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews MLB: Stolen Bases Leader across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at Polymarket Bot UK — the application we operate, where you trade directly against 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?

On Polymarket Bot UK, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket Bot UK 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.

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.