ATLANTA — The Atlanta Braves aren't blaming their free-fall toward .500 on a troubling string of injuries and illnesses. Manager Fredi Gonzalez said the excuse isn't valid when the teams beating the Braves also have injury woes. Bryce Harper hit his second homer in two days, Gio Gonzalez gave up only one hit in seven innings and the Washington Nationals beat Atlanta 7-2 on Sunday night to complete a three-game sweep.