Rosters have expanded and the Nationals have added four players to their active roster. Left-hander John Lannan, catcher Sandy Leon and outfielder Eury Perez have been officially recalled, while outfielder Mark DeRosa has been activated off the 15-day DL. The Nats also announced that catcher Jhonatan Solano has been reinstated from the DL and optioned to Double-A Harrisburg. More to come. Here's the Nationals lineup for this afternoon: RF Jayson Werth CF Bryce Harper 3B Ryan Zimmerman 1B Adam LaRoche LF Michael Morse SS Ian Desmond 2B Danny Espinosa C Kurt Suzuki P Jordan Zimmermann