Masataka Yoshida, Justin Slaten go on injured list

PITTSBURGH — Just hours after Red Sox interim manager Chad Tracy had his most positive injury update in weeks, revealing that three key players (Roman Anthony, Trevor Story and Isiah Kiner-Falefa) will all open Minor League rehab assignments within days, designated hitter Masataka Yoshida went down with a left hamstring strain that is going to keep him out for a while. And he was joined on…