With the 2025 Red Sox season over and an important offseason approaching, it’s time to break down each part of the Red Sox’ roster entering what should be a busy winter for chief baseball officer Craig Breslow . All week, we’ll be running a five-part series analyzing each part of Boston’s roster. Next up is a look at Boston’s bullpen entering 2026:

WHERE DO THINGS STAND?

The Red Sox, as a team, had the second-best bullpen ERA in baseball in 2025 (3.41). The club was 71-4 when leading after seven innings. By all metrics, it was an area of the roster that took a tremendous step forward, largely due to the otherworldly season of Aroldis Chapman and a nearly-as-excellent final few months from Garrett Whitlock, who emerged as the setup man and dominated.

* ** READ Part I of our

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