The blister forced Hellickson to leave that start after four innings, but the team had optimistically penciled him in to start the second game after the break Saturday against the Giants.
Instead, Hellickson will be pushed back to July 21 when the D-backs play host to the Marlins. He will be changing places with Chase Anderson, who will now start Saturday.
The D-backs' rotation coming out of the break will be Robbie Ray, Anderson, Patrick Corbin, Rubby De La Rosa and Hellickson.
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.