The D-backs closer struggled with his command while allowing four runs in just two-thirds of an inning Wednesday night against the Cardinals.
"He's not locating," D-backs manager Kirk Gibson said after that game. "Not throwing the ball where he needed to throw it. He couldn't control it."
Getting consistent work has been an issue for Putz. There was a stretch where he went six games without getting the call, yet warmed up in almost each one of those games.
Putz has two blown saves this year, including one on the team's recent 10-game road trip, when he allowed a two-run walk-off homer to the Nationals' Ian Desmond on May 2.
Gibson said pitching coach Charles Nagy has been working to see if there is something Putz is doing mechanically that is throwing off his command.
"I know Charlie watched [video of] him for a long time after that last game and again today," Gibson said. "We haven't really talked a lot about it right now. We know he's missed his location. You can see where he was trying to throw the ball and it wasn't going there. Charlie's putting a lot of time and thought into it, and we'll kind of rally up together and try to get him back on track to the way we know he's capable of throwing."
Gibson said that Putz has pretty much scrapped the cut fastball he spent the spring working on.