**In MLB's 2026 regular season, the 15-game winning streak posted by the Boston Red Sox from July 3-22 remains the longest to date, tying a franchise record and outpacing all other runs.** No team has approached or exceeded that mark since, with the longest active streak sitting at six games for the Los Angeles Dodgers as of early September. Late-season factors including playoff positioning, player rest, travel demands, and the compressed schedule window through the final weeks have limited opportunities for extended runs, aligning with the rarity of 16-plus game streaks in the modern era. Trader consensus heavily favors a 13-15 game maximum as the season concludes, reflecting this established ceiling. A realistic challenge would require an unexpected surge from a contending club like the Dodgers, Milwaukee Brewers, or Tampa Bay Rays amid favorable matchups, though roster management and the short remaining calendar make such an outcome unlikely.