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08/02/07 7:39 PM ET

Ensberg blasts two homers in finale

Newcomer's four RBIs back Peavy's seven shutout innings

SAN DIEGO -- Morgan Ensberg figured the best way to make a good impression with his new team was to essentially dust off a familiar approach that served him well in Houston.

"I was most successful when I was aggressive and when I swung as hard as I could," he said. "I came here [San Diego] with the idea that if I see the ball, I'm going to absolutely let it fly. And if not, then I'm going to go down in a huge ball of flames."

There was certainly no burnout factor on a sun-splashed day at PETCO Park, other than the trail of smoke left from two Ensberg home runs that helped the scuffling Padres to an 11-0 victory over the Diamondbacks before a crowd of 37,119.

In his first start as a Padre, Ensberg -- just five days removed from being designated for assignment by Houston -- crushed a two-run home run over the fence in left field off of Arizona starter Yusmeiro Petit (2-3) in the second inning. He added another two-run home run in the seventh inning.

Ensberg -- who later knocked a single -- was one of two newcomers to have a positive effect on the offense. Leadoff hitter Rob Mackowiak kick-started a two-run fifth inning with a single and a stolen base. Mackowiak had two hits and scored two runs.

Not a bad debut for the two newest Padres, especially from Ensberg, who was essentially left to rot on the Astros' bench. He struggled in the first three months of the season but will likely play a prominent role in the Padres' future plans.

Not that Ensberg was interested in soaking in the attention on Thursday. Instead, he tried to deflect it toward pitcher Jake Peavy, who tossed seven scoreless innings for the victory, his 11th this season.

"It felt great," Ensberg said. "I'm just so happy that I got some pitches to hit and I was happy that I accidentally threw good swings at them. It was a good game but the story here, of course, is Peavy. He threw seven shutout innings, that's really impressive. I've seen him from the other side, but what he did today looked quite effortless."

While the Padres' offense got a boost from their newcomers, Peavy essentially reverted back to his early-season form when he was as dominant as any pitcher in the Major Leagues.

And while Peavy (11-5) wasn't quite as strong as he was on April 25, when he mowed his way through the Diamondbacks' lineup to the tune of 16 strikeouts, the 10 strikeouts that he did amass were the most he's had since May 11. He allowed just three hits.

Peavy said that he's making more of a conscious effort to change speeds to get more variance between his mid-90s fastball and his off-speed pitches. That idea was reinforced for him last week while he watched Houston's Roy Oswalt do just that to the Padres.

"I started off the season fastball-slider, and teams, with all the video, make adjustments," Peavy said. "Guys were sitting hard [on my fastball]. Guys were having better at-bats."

Corey Brock is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.