The numbers show that the Houston Astros likely didn’t beat the Los Angeles Dodgers in the 2017 World Series because of their sign-stealing scheme.
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One researcher found the signaling was not perfectly accurate. He calculates that bangs accurately foretold breaking pitches 93% of the time, and no-bangs foretold fastballs only 65% of the time.
On correctly-signaled pitches, the Astros as a team improved their batting average by seven points, to .289, and their slugging percentages by 25 points.
But on wrongly-signaled pitches, they lost 45 points of batting average and 93 points of slugging.
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