Washington Nationals' Ryan Zimmerman hits an RBI double against the San Francisco Giants during the first inning of a baseball game, Monday, Aug. 13, 2012 in San Francisco, Calif.  (AP Photo/George Nikitin)

Photo by: George Nikitin

Washington Nationals' Ryan Zimmerman hits an RBI double against the San Francisco Giants during the first inning of a baseball game, Monday, Aug. 13, 2012 in San Francisco, Calif. (AP Photo/George Nikitin)