"You make a bad pitch and your mind starts going back over all the mechanical checkpoints instead of just throwing free and easy," Putz said. "Now it's time to put that in the past and just go."
That doesn't mean that he scrapped the changes.
"It's to the point now where I think the muscle memory has kind of taken over to the point where I don't have to think about it very much," Putz said.
Putz is set to throw a simulated game Thursday, his last tuneup before the regular season gets started Saturday.
"I think it will be good just to get on the mound here with the backdrop and see the visual from the mound to the plate," he said.
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.