Snake bites

• The D-backs' trade of Mark Teahen to the Reds was unable to be completed when Teahen reported a problem with his left shoulder during a physical.

"Two days prior to us trading him he dove for a ball, didn't say anything, didn't show up on any of our medical reports," Towers said. "When he did his physical over there he said he felt something in his shoulder, didn't quite feel right. [He] hadn't said anything to us. [The Reds] basically said there's some concerns because, 'We were expecting to get a healthy player, and if he's not able to go right now, we probably have less interest in doing it.'"

The D-backs were to receive a player to be named later or cash considerations in the deal.

• Second baseman Aaron Hill's recovery from his broken left hand is going slower than expected.

"It's probably healing a little bit slower than he would like or we would like," Towers said. "He's still a little bit tender to the touch."

Hill is not likely to return until the end of May at the earliest.

Steve Gilbert is a reporter for MLB.com. Read his blog, Inside the D-backs, and follow him on Twitter @SteveGilbertMLB. This story was not subject to the approval of Major League Baseball or its clubs.