Aroldis Chapman becomes Major League Baseball’s all-time career strikeout leader among relievers, reaching 1,364 strikeouts in his milestone appearance for the Boston Red Sox. The record breaks a mark that had stood for more than half a century, as Chapman surpasses the previous reliever-career standard held by Hoyt Wilhelm. Coverage describes the achievement as another standout moment in a dominant period for Chapman, who is known for his power pitching as a left-hander. In the inning when he records the milestone strikeout, Chapman works against the Los Angeles Angels, striking out Denzer Guzman. Reports note that the pitch was clocked at about 98.6 mph, underscoring that the strikeout does not necessarily require the fastest velocities associated with Chapman. While the outlets differ slightly in the framing of the moment—one emphasizes the all-time reliever leaderboard and another highlights the longevity of the record—all describe the same central outcome: Chapman establishes a new MLB benchmark for strikeouts by a reliever with his 1,364th career K.