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Middle Relief vs. Setup vs. Closer: Bullpen Roles

Middle Relief vs. Setup vs. Closer: Bullpen Roles

Bullpens decide games. Starters set the stage, but relievers protect or erase everything that came before. To understand modern baseball, you need to know how teams use middle relievers, setup relievers, and closers. This guide explains each role, how managers deploy them, which skills matter, and why the plan changes by inning, score, and leverage.

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