Washington’s Nationals, who are already without Daniel Murphy (still recovering from knee surgery) and Adam Eaton (on the DL with a bone bruise in his ankle), can ill-afford to lose a third key piece of their lineup, but in Saturday’s game against the Colorado Rockies, they were without Anthony Rendon as well, after the 27-year-old third baseman fouled a pitch off his right foot in Friday night’s matchup in the nation’s capital.