Last October, Ben Lindbergh tried answering a complicated question: which major league manager deployed his relievers in the most- and least-optimal ways. Lindbergh used a metric called BMAR―an esoteric standard for measuring "how much better were the relievers he did choose than the relievers he could've chosen at random?" Basically, each skipper's bullpen usage was compared to that of a random number generator's.
Vice Sports
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