SCOTTSDALE, Ariz. -- Kirk Gibson was not ready to commit to roles for his relievers on Monday.

"I don't have the bullpen sized up yet," Gibson said. "Our staff is not set."

Two things that are for sure are J.J. Putz in the closer's role and David Hernandez as the setup man.

Earlier in camp, Gibson indicated that free agent signee Takashi Saito would likely be his seventh-inning specialist.

Unless Gibson pulls a surprise, the seven-man bullpen figures to be Putz, Hernandez, Saito, Joe Paterson, Craig Breslow, Brad Ziegler and Bryan Shaw.

Lefty Mike Zagurski, who has had a good camp, could wind up as the odd man out. Being out of options, he would have to be placed on waivers if the team tries to send him to the Minor Leagues. Given the constant need for left-handed pitching in the Majors, it's unlikely he would go unclaimed.

Gibson hints Corbin in running for rotation

SCOTTSDALE, Ariz. -- With his comments Monday, D-backs manager Kirk Gibson seemed to leave open the possibility that Patrick Corbin could find his way into the team's starting rotation.

Corbin allowed seven runs (six earned) on six hits over 5 1/3 innings in his final spring appearance Monday against the Cubs.

When asked to summarize the left-hander's spring, Gibson said: "He's had a great spring, he's throwing the ball good. He's got good stuff, so he's definitely somebody to be considered."

Considered for what?

"He's competing for a spot on the team," Gibson said. "Well, we'll see. There's many different combinations that I've considered."

It was pointed out to Gibson that he already announced his starting rotation as Ian Kennedy, Daniel Hudson, Josh Collmenter, Trevor Cahill and Joe Saunders.

So that would mean Corbin is competing for a spot in the bullpen?

"Well, you always consider changes," Gibson said.