"Warming up, I wasn't feeling the stiffness or the clicking of my wrist," Espinosa said. "As I kept going, I was being more aggressive with my swing. I wasn't thinking about it. I was able to go loosely and naturally."
Espinosa hurt the wrist on April 14, when he was hit by a pitch thrown by Braves left-hander Paul Maholm.
Espinosa did not report there was a problem with the wrist until the team was in San Francisco last week. He went to Baltimore for X-rays on Friday morning, and that is when he learned about the bone chip in the wrist.
"The bone chip that he has is like a bruise. It's not like a fracture, when you normally think of a broken bone," Dr. Wiemi Douoguih said. "It's something that tells us that there is something wrong, but structurally, everything else is sound in that area."
In other injury news, Douoguih said Jayson Werth's right hamstring is getting better. The Nationals are hoping that Werth returns to action sometime next week. On Sunday, he ran sprints and strengthened the hamstring.
"Then again, you can't tell. You have to take it one day at a time," Douoguih said. "Yesterday, he looked good, and then you go to the next phase and hope to get him into some rehab starts the next few days."
Bill Ladson is a reporter for MLB.com and writes an MLBlog, All Nats All the time. He also could be found on Twitter @WashinNats. Tom Schad is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.