Pitchers and catchers will report on Feb. 19 and position players on Feb. 24.
The right fielder says he couldn't lift his arm over his shoulder a few days ago because of the pain but can now.
Matt Williams stopped short of calling it a platoon but is mixing and matching at second base with Ryan Zimmerman out.
Bryce Harper played five innings for Class A Potomac in a rehab assignment on Tuesday, and he capped the outing with a long home run to right field.
Williams returns to the home of the organization where he spent many years in various capacities, most recently as a coach.
For the first time this spring, Matt Williams challenged a call and got it reversed.
The Nationals also have the richest owner in baseball, according to Forbes.
The Nationals and Marlins waited almost four hours to play, and instead they will play a doubleheader tomorrow.
Scott Hairston may give Davey Johnson the right-handed first base option he has been lacking.
The NL East has been baseball's worst division this season by just about any measure.