"It's kind of a slow process," Fister said. "The process of getting complete game ready is going to be a little bit, but I'm making strides every day."
Fister appeared in seven games this season and was 2-2 with a 4.31 ERA. He last pitched on May 15 against the Padres, allowing seven runs in two innings. Fister had to sit through nearly a two-hour rain delay before taking the mound, but he said that wasn't a factor in his poor performance.
Fister said he was dealing with the forearm problems before his start in San Diego.
"It's been nagging me a little bit, the tightness," Fister said. "It has not allowed me to completely pitch to full capacity. … But that San Diego start really fired it up real tight."
Bill Ladson is a reporter for MLB.com and writes an MLBlog, All Nats All the Time. He also can be found on Twitter @WashingNats. This story was not subject to the approval of Major League Baseball or its clubs.