Zimmerman re-injured his abdominal muscle in the third inning Saturday against New York when he singled and slid headfirst into second on the throw. Zimmerman had difficulty getting up when manager Jim Riggleman and athletic trainer Lee Kuntz came to his aid.
According to Riggleman, Zimmerman had problems with the muscle in the Nats' previous series against the Marlins.
Zimmerman doesn't have any problems swinging the bat or playing defense, according to general manager Mike Rizzo.
"We have the same concern level that we had during Spring Training," Rizzo said. "He has an abdominal strain that he has been playing with. We are going to give him two days here and see where he is at afterward.
"He is fine doing most movements -- swinging the bat, playing defense and running the bases. When he slid on the abdominal, that's what made it sore."
As of now, there isn't any talk of putting Zimmerman on the disabled list. Even Zimmerman wasn't sure if he would play.
"It feels bad enough not to play today," Zimmerman said. "It's worse than it was. It's not terrible."
In the meantime, if Zimmerman has to miss a handful of games, look for outfielder Jayson Werth to hit third, while first baseman Adam LaRoche becomes the cleanup hitter.