CHICAGO (AP) --The Cubs own the best record in the majors and it sure looks as if they're the top team in their own town, too.

Jim Edmonds homered twice, Mike Fontenot went deep and Aramis Ramirez added a three-run shot, all during a nine-run fourth inning Saturday that helped the Cubs beat the White Sox 11-7 to win for the second straight day in the meeting of first-place teams.

The Cubs hit back-to-back homers twice in the fourth inning — the second straight day they've hit consecutive homers against their city rivals — and finished with 15 hits. They've now won 13 straight at Wrigley Field, where they are 31-8 this season.

The White Sox led 4-1 after two-run homers from Jermaine Dye and DeWayne Wise, before the Cubs jumped all over Jose Contreras (6-6), combining eight hits, including the four homers, into their biggest inning of the season.

The outburst made it easy for Jason Marquis (6-3) to win his fourth straight start and fifth straight decision. He gave up eight hits and five runs in seven innings and also collected two hits.