"He should be good to go [in a couple of days]. It's one of those things where it's kind of a painful thing," manager Matt Williams said. "There is no structural damage, no issues or anything else in the pictures. The cortisone shot will calm it down to get the inflammation out of there as quickly as possible. But during the process, he can't play. He has to shut it down for a couple of days at least."
Werth has been productive for the Nationals this season, hitting .279 with 12 home runs and 63 RBIs.
With Werth out, Kevin Frandsen received the start in left field, while Bryce Harper moved over from left to right field.
Bill Ladson is a reporter for MLB.com and writes an MLBlog, All Nats All the time. He also could be found on Twitter @WashingNats. This story was not subject to the approval of Major League Baseball or its clubs.