Ryan Zimmerman still has several steps to take before returning from his hamstring injury, something that may not happen until the season's final week.
Rafael Soriano began the process of fixing his mechanics on Monday with a bullpen session in front of pitching coach Steve McCatty.
The Nationals host the second-place Atlanta Braves on Monday night in the first game of a huge September series.
The Nationals' 2015 schedule, just announced, features several new twists, including a change to the Battle of the Beltways with the Orioles.
The Nationals open a three-game series with the Braves on Monday night with just 21 games left before October.