The 2026 MLB postseason stolen-base leader market reflects a wide-open field driven by the short-series format and the distribution of speed across multiple playoff contenders. Regular-season standouts such as Jazz Chisholm Jr., José Caballero, Brice Turang, Pete Crow-Armstrong, Fernando Tatis Jr., Jackson Merrill, and Chandler Simpson enter with strong base-stealing profiles, yet no single player has separated clearly because opportunities depend on team advancement, lineup placement, and matchups. Recent roster health updates and September momentum for clubs like the Yankees, Cubs, Brewers, Padres, and Braves have kept implied probabilities tightly clustered among a broad group of candidates, with lower-priced options retaining realistic paths if their teams extend deep into October. The wisdom of crowds in the market underscores how postseason stolen-base totals hinge more on situational volume than raw regular-season totals.