However Collmenter played catch before batting practice Friday and pronounced himself ready to go.
"I actually feel really good," Collmenter said. "Playing catch my arm just felt a little heavy at first, nothing different than a normal throwing session. I could pitch tonight if need be."
If Arizona manager Kirk Gibson has anything to say about it, though, it will be a restful trip to Milwaukee for Collmenter.
"I wouldn't use him today," Gibson said. "I'd have a hard time using him maybe an inning on Sunday."
Collmenter has not had any issues with his throwing arm and speculates that it's because his exaggerated over-the-top delivery puts more strain on his shoulder and less strain on his elbow. Strengthening the shoulder is easier than strengthening the elbow, which helps him stay healthy.
"One of the things that I like about being in the bullpen is the ability to be able to do stuff like that, to throw multiple days in a row and just be prepared at all times," Collmenter said. "So I just wanted to make sure that regardless of if they're trying to stay away from me for a day or two, I still want to be ready just in case I might be needed."
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.