Werth was able to work out before Wednesday's game against the Tigers. But after he finished, Werth suffered "a spasm" in the hamstring, according to Johnson
"[Werth] came in early and he still ... has a little pull or something. With the rain and stuff, he is not going to be in the lineup," Johnson said before the game. "I would like to have him in the lineup, but I want to be on the safe side."
Werth hurt the hamstring and his left ankle on April 29 against the Braves. He played last Thursday in Atlanta, but was taken out after the fourth inning.
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.