CHICAGO - Carlos Zambrano switched to longer sleeves after three innings, not so much to combat the cold -- as would be expected -- but to cover a scab on his pitching arm.

Big Z was plenty ready for the elements on a 41-degree night in mid-May and showed his sense of humor Monday night after pitching and batting the Chicago Cubs to a 12-3 win over the San Diego Padres.

"It's OK for me. I'm from Alaska," Zambrano said, drawing laughs at his postgame news conference.

"No, it's tough man, especially for me. I'm from South America, Venezuela. It is not this cold. Not even close.

"As a starting pitcher ... don't worry about the cold factor, just try to hit your spots and try to do the best you can to keep the inning quick."

But the Cubs made sure the Padres couldn't get off the field soon enough, scoring six runs in the fifth -- started by Zambrano's double -- and adding five more in the sixth, when he added a single. They had 13 hits and made the most of nine walks issued by the Padres.

Pitching with an extra day's rest after his start Sunday was scratched because of rainy conditions, Zambrano (6-1) allowed six hits and three runs in seven innings. And he was part of a batting order that was on base all night.

"I think we have a very good lineup, very balanced," said Alfonso Soriano, who homered in the fifth and is 7-for-14 during the Cubs' four-game winning streak. "Be more aggressive and, at the same time, selective at home plate. That's what I try to do because I know when I swing at a strike, I know that I hit the ball very hard."

The Cubs' first eight batters reached in the fifth on six hits and two walks. Randy Wolf (2-3) didn't retire a batter in the inning and in four-plus innings, he gave up eight hits, seven runs and five walks.

"In the fifth inning, there is really no way to candy coat it," Wolf said. "I was bad. I didn't make the pitches I needed to. They capitalized on it. You get behind and you don't locate. Those are two recipes for something bad to happen."

Jody Gerut's first homer in nearly three years gave the Padres a 2-1 lead in the top of the fifth, but the Cubs quickly responded.

Zambrano drove a ball off the wall in right-center for a leadoff double and Soriano followed with a drive to left-center that just cleared the fence for his fourth homer, putting Chicago up 3-2.

Ryan Theriot walked, Derrek Lee singled and Aramis Ramirez had an RBI single before Kosuke Fukudome worked a walk to load the bases. Geovany Soto's two-run single through the middle made it 6-2 and finished Wolf. Mark DeRosa then greeted reliever Sean Henn with an RBI single.

"He couldn't make a pitch to get himself out of it," Padres manager Bud Black said of Wolf.

In the sixth, the Cubs batted around again.

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