Washington’s Bryce Harper catches a fly ball during the Nationals’ loss to the Phillies on Sunday. Harper, at 19, is the youngest of a young nucleus that Washington general manager Mike Rizzo has put together. Along with Harper, Steve Lombardozzi (23), Stephen Strasburg (24), Danny Espinosa (25), Drew Storen (25), Jordan Zimmermann (26), Ryan Zimmerman (27), Ross Detwiler (27), Gio Gonzalez (27), Tyler Clippard (27) and Ian Desmond (27) are all under 30. (Associated Press)