The 36-year-old Putz was placed on the disabled list on August 24 after suffering a dislocated right little finger the previous night while attempting to field Kevin Frandsen's ground ball to end the seventh inning at Citizens Bank Park. Putz had gone 3-1 with 6 saves and a what seems like a surprisingly-low 2.43 ERA (8 ER in 29.2 IP) over 35 appearances with the Diamondbacks this season, including a 0.57 ERA (1 ER in 15.2 IP) over his last 19 outings.
Obviously, this is a fairly minor move, but it'll be interesting to see how this affects things in the event of any save situations the rest of the way. Brad Ziegler has been the designated closer, and done very well in the role, but Kirk Gibson has made little secret of the fact that it's not the most desirable situation for him. It's like true to say that Zig only got the job because of the unavailability and ineffectiveness respectively of Putz and Heath Bell.
Putz's last "true" save came all the way back on July 1 - he did have one in August, but that was more because he was the last man standing out of the bullpen, in the 16-inning victory over the Pirates. If the team are looking to return Putz to the closer's role for 2014, then I wouldn't be surprised if he is given a couple of save opportunities in these last couple of weeks, as much to provide him with some psychological re-assurance going into the off-season, as anything else.
No need for any corresponding roster move, with the September expansion now being in effect. The D-backs' active roster is at 32, for what it's worth.