Yankees’ depth pieces have rough go of it in ugly loss to Red Sox

Amed Rosario and Ali Sánchez are supposed to provide depth, part-time players who help the Yankees when given an opportunity. The duo hurt them Saturday afternoon. Rosario’s baserunning mistake and Sánchez’s passed ball cost the Yankees multiple runs in their 6-0 loss to the Red Sox to start a crucial day-night doubleheader in The Bronx. They were key plays in a game manager Aaron Boone said the Yankees performed “poorly.” Rosario’s gaffe — he failed to score from second base on Heliot Ramos’ double that eluded Ceddanne Rafaela in deep center field — prevented the Yankees from scoring the tying run in the fourth inning. Rosario was looking to tag up on the play rather than go halfway and was thrown out by a wide margin at the plate. “Difficult read there, but at the end of the day, I just