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08/26/12 4:59 PM ET

Goldschmidt impressing Gibson with strength, defense

PHOENIX -- Despite being in the lineup for 33 consecutive games entering Sunday, D-backs first baseman Paul Goldschmidt won't receive any days off any time soon.

"Not at this point, the way he takes care of himself, does he look tired to you?" D-backs manager Kirk Gibson said. "He's a little younger and I think he's good. I'm not saying I won't [rest him a day] but as of right now, no."

The 24-year-old hasn't missed a game since July 22. In 84 at-bats in August, Goldschmidt is hitting .262 with three homers, six doubles and 13 RBIs. The improvement in his defensive game, however, has been what's impressed Gibson the most.

"He seems like he's got a lot of energy, he's not dragging, he wants to do it," Gibson said. "He's religiously out there working on his movements that he has to duplicate within the game so he can be better, quicker and have more range."

Collmenter 'good to go' after ulcers

PHOENIX -- D-backs right-handed pitcher Josh Collmenter's stint on the 15-day disabled list has been an unusual one, to say the least. The club placed him on the shelf on Aug. 10 with ulcers, leaving the 26-year-old in the hospital for three days to recover.

But after he was released, everything went back to normal for Collmenter. The ulcers, albeit extremely painful, left no injury from which to recover.

"I've felt fine, it was just getting my energy level back up after the blood loss," Collmenter said. "It was as if nothing ever changed. I'm on the DL but I don't really have to rehab anything. I'm good to go and there have been no setbacks."

The latest step forward for Collmenter was a scoreless three-inning appearance with four strikeouts in a rehab start with the Arizona League on Friday. His next time out, he will try to extend his pitch count and hopefully toss four frames.

"It went well, I was able to get lengthened out," he said. "I tried to make pitches that I would make over here instead of pitches I thought they would swing and miss at or could chase. I tried to treat it like a sequence I would do over here and it went well."

Tyler Emerick is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.