ST. PETERSBURG, Fla.—New York Yankees shortstop Gleyber Torres tested positive for COVID-19 despite being fully vaccinated and having previously contracted the coronavirus during the offseason. Torres is among eight so-called breakthrough positives among the Yankees—people who tested positive despite being fully vaccinated. “Certainly unexpected,” Yankees manager Aaron Boone said of Torres. “Obviously everyone, Major League Baseball, that’s in charge of testing is looking into that. The variants that could be out there if that is the case.” The Yankees said the team is undergoing additional testing and contact tracing, with the assistance of the baseball commissioner’s office and its medical experts. The New York State Department of Health is advising the team. New York general manager Brian Cashman said MLB was in contact with the Centers for Disease Control and Prevention on Thursday about the Yankees situation. “With regard to the Yankees, we obviously need to learn more about that …