MASNSports.com's Phil Wood is reporting that the Nationals have called up Pete Orr to replace the injured Nyjer Morgan on the roster:

"Why Orr? Two reasons: one, Willie Harris will take over in centerfield, and they need a new utility guy off the bench; and two, a couple of NL clubs have scouts following the Nats with a specific focus on Ronnie Belliard. Should Belliard be traded, they'll need someone with specific second base experience."