Gavin Williams holds a narrow edge in the MLB postseason strikeout leader market due to his 24 strikeouts across 11.2 innings in the Guardians' ALDS run, including a 12-K outing that helped Cleveland advance. The race remains tight because the ALCS between the Guardians and Rays and the NLCS featuring the Brewers and Dodgers feature multiple high-K starters with significant remaining workload potential, such as Parker Messick, Drew Rasmussen, Freddy Peralta, and Yoshinobu Yamamoto. Recent regular-season K/9 rates above 9.0 for several arms, combined with the possibility of extended series and bullpen usage, keep implied probabilities clustered near 50% for leading candidates while lower-priced options retain realistic paths if their teams reach the World Series.