Washington Nationals starting pitcher Jordan Zimmermann rubs up a new baseball after giving up a solo home run to St. Louis Cardinals' Matt Adams during the sixth inning of a baseball game Wednesday, Sept. 25, 2013, in St. Louis. (AP Photo/Jeff Roberson)

Photo by: Jeff Roberson

Washington Nationals starting pitcher Jordan Zimmermann rubs up a new baseball after giving up a solo home run to St. Louis Cardinals' Matt Adams during the sixth inning of a baseball game Wednesday, Sept. 25, 2013, in St. Louis. (AP Photo/Jeff Roberson)