It was his second straight strong start. In his previous outing, against the Giants, the right-hander allowed just two runs on three hits over five innings, but both games ended in losses for his team.
"It feels good to get my command back a little bit," Hellickson said. "But I've got to pitch better. It's two losses. It doesn't really matter what else I do."
Hellickson's command was off when he last faced the Padres on Sept. 14, in large part because it was his first outing since spending a month on the disabled list with a left hamstring strain.
"He had the injury and it really put him back," D-backs manager Chip Hale said. "That really hurt him that one outing [against the Padres]. After that he's been solid again. He's a veteran and he's done a nice job for us so it's good."
The lone run off Hellickson came when Cory Spangenberg led off the sixth with a double, advanced to third on a wild pitch and scored on a sac fly by Jedd Gyorko.
"I thought my stuff was pretty good," Hellickson said. "Fastball command was good early. I started to elevate some pitches later in the game, especially that sac fly. Really trying to get a grounder right there. I just elevated a little too much. That's the last thing I want to do, for a pitch to get in the air."
Steve Gilbert is a reporter for MLB.com. Read his blog, Inside the D-backs, and follow him on Twitter @SteveGilbertMLB. This story was not subject to the approval of Major League Baseball or its clubs.