• Right-hander Daniel Hudson, who is rehabbing from his second Tommy John surgery in two years, threw a bullpen session Wednesday.
Gibson said Hudson may be able to return in July and when he does, it will be as a reliever rather than a starter.
• Shortstop Didi Gregorius, who was optioned to Triple-A Reno last weekend, will see some time at second base as well as shortstop while he's there.
Gregorius will alternate between second and short with prospect Nick Ahmed.
"I just think they're both shortstops and they can't both play shortstop every day," Gibson said. "It will do them good to work around the bag from both sides. That's kind of, organizationally, what we've decided."
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.