There was no immediate word on the condition of Werth. The Nationals are one of the few teams that do not give possible injury updates during a game.
On a night when the gametime temperature was 58 degrees, there was no obvious sign that Werth was hurt. He made a long run into the alley on a double by Ty Kelly in the seventh. Werth singled to lead off the last of the seventh and then was retired when Bryce Harper reached on a fielder's choice as Werth slid into second.
Werth is hitting .303 with six homers and 11 RBIs.
Earlier in the game, the Nationals used two other bench players -- Wilmer Difo and Brian Goodwin -- as pinch hitters. That left Adam Lind and catcher Jose Lobaton as the only position players on the bench after Heisey came in.