Putz felt like he was finally regaining his old form prior to the injury after struggling to get his arm strength back following a stint on the disabled list.
Putz was on the DL from May 8 until June 29 with a strained elbow, and it took him a while after that to get back on track. In 13 games prior to injuring his pinkie, Putz had allowed only one run in 10 2/3 innings.
"He's been throwing, he's getting better, but he's a ways off," D-backs manager Kirk Gibson said. "He's progressed a lot since he started throwing."