Turner was diagnosed with a broken right index finger after Tuesday's loss to the Phillies, Buster Olney of ESPN reports.
Turner exited Tuesday's game after being struck by a pitch on a bunt attempt during the first inning. This is worst-case scenario for the Nationals as the 25-year-old is now likely headed to the injured list for a significant absence, though he has no official timetable for his return. Wilmer Difo will likely be called upon to fill in at shortstop in the short term.