Yunel Escobar had to exit Monday's game versus the Reds with left hamstring tightness.
Denard Span left Monday's game against the Reds with back spasms.
Doug Fister limited the Reds to two runs (one earned) over six innings, but took a no-decision as the Nationals ended up losing on Monday.
Danny Espinosa homered in a 2-for-4 effort Monday as the Nationals lost to the Reds.
Yunel Escobar exited Monday's game versus the Reds with an undisclosed injury.
Denard Span left Monday's game against the Reds with an undisclosed injury.
Max Scherzer was among the pitchers named to next week's National League All-Star Game.
Nationals placed RHP David Carpenter on the paternity leave list.
Nationals recalled LHP Sammy Solis from Double-A Harrisburg.
Nationals RHP prospect Nick Pivetta took a perfect game into the seventh inning Sunday in a win for High-A Potomac.
Wilson Ramos clobbered a solo home run in the sixth inning on Sunday, powering the Nationals to a 3-1 victory over the visiting Giants.
Drew Storen secured his league-leading 25th save on Sunday, retiring the heart of the Giants lineup to preserve a two-run advantage.
Jordan Zimmermann pitched brilliantly in Sunday's victory over the Giants, allowing just one run on three hits over seven strong innings.
Bryce Harper was the leading vote getter in the entire National League for the All-Star game, garnering 13,864,950 ballots.
Jayson Werth (wrist) was able to take swings with a fungo bat for the first time on Saturday.