"I'm not really concerned about this," Baker said. "A younger player might have tried to push it and something [could] happen. But Jayson being a veteran, he knows his body pretty well."
Werth, who finished the game 1-for-2 and made a few sliding catches in the outfield, declined to elaborate to the media after the game but insisted "I'll be fine." Chris Heisey filled in as his replacement and went 0-for-2.
Werth became the second Nationals player to leave the game early after starter Joe Ross left after two scoreless innings with a blister on his right middle finger.
Baker has been careful with his veterans. Werth, who turns 37 next month, and Ryan Zimmerman are coming off injury-plagued 2015 seasons. Werth was limited to 88 games last season and never found a rhythm as he battled a plethora of injuries.
"I'm trying to get those guys past the point where you're not worried about them anymore," Baker said.
Jamal Collier is a reporter for MLB.com. Follow him on Twitter at @jamalcollier. This story was not subject to the approval of Major League Baseball or its clubs.