"In late May, Zach Duke won his first start after missing 51 games with a broken left hand that he suffered when hit by a line drive in spring training.

He hoped that victory would be the impetus he needed to vault him into a featured role on the Diamondbacks pitching staff. Since then, however, he has not won a game, and the frustration is gnawing at him.

That irritation increased a bit Wednesday in the Diamondbacks' 6-2 loss to the Indians in front of 26,876 at Chase Field.

"I know what I'm capable of," Duke said. "The main thing for me is consistency. Each time out, you know what you're going to get from me. At this point, I haven't really showed that, but I feel like I'm right on the brink."

After that first start, Duke (1-3) has three losses and three no-decisions. In Wednesday's setback, he gave up four runs and nine hits in five innings but pitched much better in his fourth and fifth starts.

"That's the most frustrating part for me, putting the team in a hole on a consistent basis the way I have," he said. "Next time out, my goal is to give us some zeroes there and win the game."

Duke had some bad luck, as some ground balls just eluded his infielders, and one took a bad hop and hit third baseman Ryan Roberts in the face. And after three innings, the Diamondbacks were down 4-0.

Still, that's part of the game, and Duke knew he had to respond.

"At that point, you just think about putting up some zeroes, keeping the score where it is, not let things get any worse, and thankfully I was able to put up two zeroes before I was taken out, and we still had a chance.""