The D-backs closer was scratched from his appearance last Friday when he experienced back tightness while warming up. Putz threw from 60 feet for around seven minutes.
"I felt good," he said. "I think it's kind of looking more and more like [it was] a little spasm. We still have some work to do to get it completely gone, but for the most part I think we're going in the right direction."
When asked how relieved he was about how he felt, Putz said, "A lot. Talking with the training staff, I don't think it's anything to be overly concerned about."
Depending on how his back responds Tuesday, Putz's next step will be to throw long toss.