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MLB Bullpen Rankings: Teams Struggle Despite Strong Expectations

9/6/2025

43 4 Full Breakdown

Summary

Story summary

Six of 13 MLB teams rank in the top 10 for expected bullpen strength.
The Brewers hold a 3.29 FIP but have recently blown five saves.
Many playoff teams, including the Red Sox, struggle; only Boston has an ERA below 4.00.
The Mets, despite losing six relievers to injuries, may still build a solid bullpen.
The Blue Jays and Phillies revamped their bullpens but face injury and performance challenges.

History

Historical Context

In 1975, Major League Baseball implemented the designated hitter rule, transforming offensive strategies. This shift coincided with evolving bullpen roles, as teams increasingly relied on specialized relief pitchers. Today, teams like the Milwaukee Brewers face challenges with a 3.29 FIP, reflecting the growing importance of bullpen strength in achieving postseason success, especially amid injuries affecting key players.

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Story summary

Six of 13 MLB teams rank in the top 10 for expected bullpen strength.
The Brewers hold a 3.29 FIP but have recently blown five saves.
Many playoff teams, including the Red Sox, struggle; only Boston has an ERA below 4.00.
The Mets, despite losing six relievers to injuries, may still build a solid bullpen.
The Blue Jays and Phillies revamped their bullpens but face injury and performance challenges.

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