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The New York Yankees made their displeasure with the Houston Astros known. During the 2019 ALCS, the Yankees accused the Astros of using whistling to signal to the Astros hitters. And after the commissioners office confirmed that yes, the Yankees were indeed victims of cheating, guys like CC Sabathia were pretty ticked off.
But with the speculation that the Astros upped the anti by affixing their players with buzzers to electronically send them what pitch was coming, this truly has become the biggest scandal to hit baseball since the Chicago Black Sox.