MLB: Stolen Bases Leader

Platform comparison

Active sub-markets

Market context

The 2026 Major League Baseball regular season will determine which player records the highest number of stolen bases, with Nasim Nuñez currently leading at 31 steals and Bobby Witt Jr. close behind at 28[1][5]. This market resolves to the official leader as defined by MLB rules, applying a multi-tier tiebreaker favouring fewer caught stealings, then higher on-base percentage if needed[4].

Historical precedent in sports statistics markets shows that early-season leaders often face volatility as projections adjust; for instance, 2025 projections favoured Elly De La Cruz and Chandler Simpson with 41 steals each, yet mid-season realities shifted the field significantly[3]. The current 8% crowd-implied probability reflects this uncertainty, mirroring how Eurovision’s 50/50 jury and televote split creates unpredictable outcomes despite early televote dominance[1]. Traders should watch for injury announcements, roster changes, and the start of the second half of the season, as these catalysts frequently alter stolen-base trajectories[9]. Recent news from Fox Sports confirms Nuñez’s lead remains tenuous given Witt Jr.’s consistent pace and the depth of contenders like Jose Caballero[2].

The cultural narrative momentum favours speed specialists, yet the tiebreaker rules introduce a strategic layer where caution against caught stealings may outweigh pure volume[4]. This dynamic resembles the Oscars’ preferential ballot for Best Picture, where consensus often overrides initial frontrunners[1]. As the settlement window closes on 28 September 2026, the market will hinge on whether Nuñez maintains his lead or Witt Jr. capitalises on late-season opportunities[1].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track MLB: Stolen Bases Leader on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

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?

On PolyGram, 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?

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.

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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, PolyGram triggers a quick verification flow that finishes in minutes.