Nationals RHP Doug Fister (elbow inflammation) reported feeling a little "tight" after throwing on flat ground for the third consecutive day Thursday. He is still scheduled to throw a bullpen session Friday, then be evaluated.
Williams theorized the tightness could be attributed to three consecutive days of throwing and the weather conditions.
"It's a cold, windy day out there, so we're not putting too much into that," Williams said.
Ryan Zimmerman is not expected to play until Saturday because of shoulder and body tightness. Williams wasn't concerned about the injury being serious.
Left fielder Bryce Harper started Thursday's game, but is dealing with a chest cold and will be off Friday and evaluated for Saturday. Shortstop Ian Desmond, already bothered by an injured finger, was also feeling ill and was sent home Thursday.
New York 1B Ike Davis (calf muscles) and OF Lucas Duda (hamstring) are still day to day. Mets manager Terry Collins said if Duda did anything Friday, it would be on a back field.
NATIONALS MAKE MORE CUTS
The Nationals optioned outfielder Michael Taylor and left-hander Matt Purke to Double-A Harrisburg. The team also reassigned right-handers Clay Hensley, Josh Roenicke and Daniel Stange to minor league camp along with left-hander Danny Rosenbaum.