The Red Sox bullpen took a big step forward in 2025, posting a 3.41 ERA that ranked second in MLB behind only the San Diego Padres.

But how did each reliever fare individually? Today we conclude our report card series by handing out grades for the relievers.

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Even at age 37 Chapman remained among the hardest throwers in baseball, hitting 103 mph on the radar gun while routinely overpowering opposing hitters. But while that was impressive enough, what really stood out about Chapman’s stellar season was his command. The veteran closer’s 6.6% walk rate this season was nearly half his career average (12.2%) and a massive improvement over the 14.7% rate he posted in 2024. That combination made Chapman a nightmare for opposing hitters and allowed him to post one of the most do

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