Boston Red Sox closer Aroldis Chapman sets a major league record for strikeouts by a reliever, reaching his 1,364th career strikeout. The milestone breaks the previous standard held by Hoyt Wilhelm, which had stood for more than half a century. Multiple outlets describe Chapman as the new all-time leader among relievers, ending a tie on the career leaderboard with Wilhelm and moving to the top of the record book. The strikeout comes during Chapman’s continued dominant run in the bullpen, marking his 1,364th K in a 17-year major league career. One report notes the strikeout came on a pitch clocked at 98.6 mph, recorded against Angels batter Denzer Guzman, with the batter unable to get around in time. Coverage frames the achievement as part of Chapman’s established profile as a high-velocity, high-leverage reliever. Other reporting also looks ahead to what follows after the record, while the core point across sources remains that Chapman reaches and surpasses Wilhelm’s long-standing mark for reliever career strikeouts.