Snake bites

• While Randall Delgado starts against the Reds on Thursday, fellow fifth starter candidate Archie Bradley is expected to pitch in a Minor League game.

• Gibson said Patrick Corbin, who underwent season-ending Tommy John surgery on Tuesday, is in better spirits this week after being "crushed" by the injury when it occurred. The skipper expects Corbin to be back with the team by the club's home opener vs. the Giants on Monday.

Cody Ross (hip) continues to inch forward in his rehab, playing outfield in a Minor League game Tuesday. But the D-backs still seem to think he won't be ready when he's eligible to come off the disabled list on April 3.

"That's probably a stretch," Gibson said. "When he's ready he's ready. You can let your hopes and wishes get in the way of making the right decision, but he's been good about not doing that. I think it's important he gets to where he needs to be, then plays several games. He is in agreement with that."

• There is still no official word on who will win the D-backs' starting shortstop and backup catcher jobs. Gibson said it is "unresolved at this point" and the club wants to let it "play out a little longer."

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