Needing to clear a roster spot for Rick Ankiel, the Nationals designated outfielder Brett Carroll for assignment following Friday night's 13-inning win over the Reds.
Jayson Werth delivered a game-winning bases-loaded single up the middle in the bottom of the 13th.
Center fielder Rick Ankiel will come off the DL in time for tomorrow's game and re-assume his spot in the Nationals' lineup.
Jordan Zimmermann takes on Bronson Arroyo as the first-place Nationals go for their fourth-straight win. Mark Zuckerman has all the updates live from Nationals Park.
Riding a streak of 19 consecutive scoreless innings, the Nationals' starting rotation has helped propel its team into first place.