Things went Jake Peavy's way against the Diamondbacks on Saturday night. At one point, the reigning Cy Young Award winner retired 14 consecutive batters during seven scoreless innings at Chase Field.

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Jake Peavy's monthlong stay on the disabled list is fading into memory.

Peavy threw seven scoreless innings, and Scott Hairston homered twice in the San Diego Padres' 4-2 victory over the slumping Arizona Diamondbacks on Saturday night.

"I was definitely better than I had been my previous couple of starts," said Peavy, sidelined for just under a month in May and June with the sore elbow. "I'm getting back to where if I have decent stuff. I'm going to do much better than I have."

Adrian Gonzalez also homered for the Padres, who have won two straight after dropping 10 of their previous 11.

Stephen Drew homered for the Diamondbacks, who lost for the fifth time in eight games to fall two games under .500 for the first time this season.

"It's just kind of the same old theme here," Arizona manager Bob Melvin said. "They get a couple of runs, and we have a hard time coming back. We just have to start playing better. We don't have as confident a look in our eye."

Peavy (6-5) allowed just three hits, walked two and struck out six. After walking Miguel Montero with one out in the second, the reigning Cy Young Award winner retired the next 14 batters.

"I battled through the first two, but then I found my groove and did what I do best, which is throwing strikes and staying ahead of the hitters," Peavy said.

Trevor Hoffman allowed Drew's one-out homer into the Padres' right field bullpen in the ninth and a two-out single to Montero before recording his 16th save.

Arizona starter Doug Davis (3-4) gave up seven hits in a season-high eight innings. He could not overcome the two pitches thrown to Hairston.

"If you're going against somebody like Peavy you've got to put zeros up there," Davis said. "You know it's going to be a low-scoring game with Peavy out there. It was just two mistakes, and Scotty's a guy where if you leave something up in the zone he's not going to miss it."

Luke Carlin led off the third inning with a single, and Hairston followed one out later with a home run into the spa beyond the fence in right-center to give San Diego a 2-0 lead.

Hairston led off the sixth with his second homer, a fly a half-dozen rows into the left field stands.

"When you come back against a former team you want to do well," said Hairston, traded by Arizona to San Diego last July 27. "I think I didn't perform to my capabilities when I was given a chance (in Arizona). There you have it. If it's anybody's fault, it's mine."