Bryce Harper has a sore back, but the rookie has no intention of missing any time with the Nationals. Harper had the wind knocked out of him diving for a ball in the ninth inning of Thursday's game against the Mets. After the game, Davey Johnson revealed that the 19-year-old had been receiving treatment on his lower back. "I'm totally fine," Harper said. "I'm going to play. I won't be out of the lineup."