Zimmerman will take another round of BP during the off-day at Nationals Park on Monday. If all goes well, Zimmerman will start on Tuesday against the Pirates.
Zimmerman has missed the last 12 games and acknowledged that it has been hard to watch the games on the bench. The Nationals are 7-5 without Zimmerman.
"It has been hard the whole time, not just this series [against the Phillies]," Zimmerman said. "The team has been playing good. They've been winning. We won another series. Hopefully, we'll win again tonight. Taking two out of three is the goal. They are playing really well when I'm not in the lineup. [Stephen Lombardozzi] has been hitting the ball great, [Chad] Tracy has been doing well. It's nice to see those other guys step up."