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3/6/2013 7:26 P.M. ET

Snake bites

• Didi Gregorius is scheduled to make his D-backs debut on Thursday against the Brewers. Gregorius will be limited to DH duty as he is still being brought along slowly after he experienced elbow discomfort in December.

Gregorius has been playing catch from 60 feet over the past week and could be ready for the start of the Triple-A season.

"It's going great," D-backs manager Kirk Gibson said of Gregorius' progress. "At the same time, we're going to stay on the program. It's the right thing to do. He's exactly on schedule. He's had no setbacks along the way."

• Patrick Corbin suffered through his first poor outing of the spring. The left-hander, who is competing with Tyler Skaggs and Randall Delgado for the No. 5 spot in the rotation, allowed four runs in one inning of work against the Royals after not giving up a run in his first two appearances covering five innings.

All of the runs came on Alex Gordon's grand slam.

• Archie Bradley, one of the D-backs two first-round Draft picks in 2011, seventh overall, allowed one run on two hits in one inning on Wednesday. It was the right-hander's first-ever appearance in a big league game.

"It was exciting," Bradley said. "Obviously the adrenaline was flowing and I was a little nervous."

Skaggs boosts chances of making rotation

SCOTTSDALE, Ariz. -- Tyler Skaggs tossed three shutout innings on Tuesday night against Team Mexico to help in his quest to win the No. 5 spot in the roation. After that outing, D-backs manager Kirk Gibson said he thought Skaggs may have been pressing in his bid to impress. Skaggs said that was not the case.

"I felt really good in the bullpen I just couldn't bring it out into the game," Skaggs said. "Honestly, I just think it was one of those days where you can't find the zone. On those days you've got to minimize the damage and I didn't."

Skaggs was able to work out of a jam in his final inning Tuesday night.

"He had a real lively fastball tonight," Gibson said after the game. "The umpire had kind of a high zone, a big zone, allowed him to throw it up there. He utilized it, didn't try to get too tricky, stayed with his good stuff, got out of that inning."

Skaggs put in some extra work during a bullpen session between his outings.

"I worked on a lot of stuff this week in the bullpen," Skaggs said. "Not really mechanical stuff, just throwing fastballs, throwing as hard as I can through the catcher and I think it worked."

Spring is stretch time for Putz

SCOTTSDALE, Ariz. -- It's not often you'll hear D-backs closer J.J. Putz say he likes to have a runner on first base.

But this is Spring Training, the time to work on things and one of those is pitching out of the stretch.

"It was good to work on slide steps and varying my times to home plate, which is something we take pride in here," Putz said. "It's one thing to work on slide steps in the bullpen when you can create your own tempo. But once you get out there, everything is faster and I felt a little jumpy. I'm going to have to look at some video, but times were good to the plate."

Tuesday night was the first outing of the spring for Putz and he tossed a scoreless inning, allowing one hit.

The one thing Putz did not get to do was throw his signature split-finger fastball.

"I wasn't really planning on waiting on it, but there just wasn't a good time to throw it," Putz said. "Threw two sliders, though. It was a good outing."

Steve Gilbert is a reporter for MLB.com. Follow him on Twitter @SteveGilbertMLB. This story was not subject to the approval of Major League Baseball or its clubs.