NEW YORK -- It was hard not to notice Yankees closer Aroldis Chapman shaking his left throwing arm during his ninth-inning, mop-up appearance in Friday night's 5-1 loss to the Houston Astros.
Pitchers normally don't do that unless something's wrong.
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Yankees head athletic trainer Steve Donohue quickly jogged out from the dugout to the mound to check on the Cuban fireballer.
Chapman insisted he was fine and was allowed to stay in the game for one more batter .