Aroldis Chapman was one of the most surprising players on the Boston Red Sox — and maybe in MLB, as a whole — in 2025. The closer posted possibly the best season of his career at age 37, with a 1.17 ERA, a 0.70 WHIP, 85 strikeouts, 15 walks and 32 saves on 34 opportunities over 61.1 innings.
Chapman has played for six other teams over his 16 years in MLB, and his sudden dominance could sting. It likely hurts his longest tenured club, the New York Yankees, the most. Red Sox fans despised Chapman during his years in New York, and the Sox fixed his longstanding struggles with command after just one season.