Patrick Corbin will not be the Diamondbacks' Opening Day starter in 2015. In fact, Corbin, 25, may not even throw his first pitch next season until June, manager Kirk Gibson said Tuesday. Gibson said the Diamondbacks will be conservative in their treatment of Corbin, who had Tommy John surgery on March 25. "I think with Patrick it will be more like June for him," Gibson said. "He'd probably punch me if heard me saying that but you're really going to take your time and make sure he's ready to go. You're not going to expect him to come back and throw 220 innings. You kind of manage his rehab through innings and put him in a position to finish strong. … We're going to make sure we err on the side of very cautious." Corbin is just one of several Diamondbacks pitchers — along with David Hernandez, Matt Reynolds, Daniel Hudson and Bronson Arroyo — who could be coming back from Tommy John surgery in 2015. Gibson said the rash of Tommy John injuries this year has convinced the organization that a cautious approach in rehabilitation is the best way to go.