"There's no worry about [Harper's knee]," Rizzo said. "It is our protocol that players get a second opinion on any part of the body that we feel is a disabled list-type of injury. Guys get second opinions all the time here, and every guy that we put on the disabled list has gotten a second opinion.
"James Andrews, we utilize him for our knees. When there was a hand injury, we didn't send [anyone] to James Andrews. We sent him to a hand specialist for a second opinion. That didn't make any headlines, but it's protocol."
Harper, who is eligible to come off the 15-day disabled list on Tuesday, flew to Pensacola, Fla., on Sunday and will meet with Andrews on Monday morning. The reigning National League Rookie of the Year will rejoin the team in Colorado on Tuesday.
Bill Ladson is a reporter for MLB.com and writes an MLBlog, All Nats All the time He can also be found on Twitter @WashingNats. Tom Schad is an associate reporter for MLB.com Follow him on Twitter @Tom_Schad. This story was not subject to the approval of Major League Baseball or its clubs.