Braves catcher Evan Gattis could miss the entire series with strep throat.
Since the start of 2013, the Braves have shut down the Nats lineup with a mix of good scouting and pristine execution.
Werth left the game in the 10th with groin tightness of a wild game, and another loss to the Braves.
The Nationals' reign atop the NL East was short-lived.
The team's unorthodox but successful arrangement at leadoff returns just in time for the MLB playoffs.
The NL East has been baseball's worst division this season by just about any measure.
Manager Davey Johnson is sticking with Adam LaRoche though his hellacious slump.