"He showed no signs of anything," manager Matt Williams said. "He said he felt fine, but we have to evaluate him. He feels good about it."
According to pitching coach Steve McCatty, Fister will pitch three innings in his next start, while Williams said Fister will pitch in a Major League game.
"I thought he threw the ball well. The best part was that he had no complaints, so I thought it went well," McCatty said.
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.