He said a few days ago that switching from an over-the-top delivery to more of a sidearm throw is "a work in progress, but there's no pain."
Nationals place Zimmerman on DL →
"Could be some bad luck there," Espinosa said. "At the same time, they can make pitches. I don't know. Every guy's got a different approach there, so you can't really tell what everyone is doing. Nobody's trying to get out."
Big hits elude Nats in 4-3 loss to San Diego →