"I don't know what that means," added Ventura with a laugh.
Dunn played for the Nationals in 2009-10 and played 84 games in the outfield during the 2009 season.
"I know it's obviously a big park, but it'll be fine," Dunn said. "It'll actually be kind of fun if I do it."
Scott Merkin is a reporter for MLB.com. Read his blog, Merk's Works, and follow him on Twitter @scottmerkin. This story was not subject to the approval of Major League Baseball or its clubs.