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Aroldis Chapman Dominates as Red Sox Closer With MLB-Best ERA

The 37-year-old left-hander has turned a presumed setup role into a dominant closing run for Boston.

Overview

  • Chapman owns a 1.08 ERA and 0.700 WHIP with 24 saves and 71 strikeouts in 50 innings this season.
  • His 1.08 ERA is the lowest among MLB relievers, and he is setting career bests in ERA, WHIP, and walk rate.
  • He has not allowed a run since July 23 and has yielded just two runs (one earned) over his last 27 innings across 30 appearances.
  • Signed to a one-year, $10.75 million deal after a 2024 season in Pittsburgh, he moved from an expected setup job to closing due to bullpen injuries.
  • His fastball and sinker are averaging 98.6 mph and 99.7 mph while regularly touching triple digits, strengthening Boston’s late-inning reliability.