Aroldis Chapman has been one of the biggest surprises of the Boston Red Sox's 2025 season, even into September. Chapman entered the ninth inning of the Red Sox's September 7 win over the Arizona Diamondbacks and added yet another scoreless frame to his stat sheet. Aroldis Chapman's four-strikeout inning helps push him toward Red Sox and MLB historyAroldis Chapman's 4 strikeouts in the 9th. Chapman has posted a 0.98 ERA, a minuscule 0.64 WHIP, 85 strikeouts and 14 walks in 55 innings this season. More Red Sox reads: