The Nationals are thinking about Zimmerman having an MRI on Friday.
In the bottom of the third inning, Phillies right-hander Kyle Kendrick hit Zimmerman in the right hand with a pitch. Zimmerman was seen jumping up and down in pain after being hit. Manager Manny Acta and head trainer Lee Kuntz came to Zimmerman's aid before the latter walked to first base.
A few minutes later, Zimmerman scored on a Jesus Flores base hit before leaving the game in the top of the fourth.
"It actually doesn't feel that bad. I think the X-rays were good," Zimmerman said. "It's a little swollen now. But other than that, it feels better now than when I came out."
This is Zimmerman's second injury this season. He missed 48 games because of left labrum tear.
Bill Ladson is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.