Getty The New York Yankees finally confirmed what the numbers had been screaming: Anthony Volpe has played through a left-shoulder labrum tear for months . Aaron Boone said Thursday the shortstop has a “small tear,” and the club expects him to keep playing—an injury first identified in May but only now fully revealed. Volpe received cortisone after the All-Star break and again on Wednesday, then sat out a second straight game while the Yankees labeled him “day-to-day.” The performance collapse