Pat Burrell and Aaron Rowand each drove in three runs and the San Francisco Giants beat the Chicago Cubs 13-7 on Tuesday in the first game of a day-night doubleheader.
The Giants' offensive outburst surpassed their season high of 12 runs, which they set at St. Louis on June 2. They also stretched their winning streak to six games.
Burrell had three hits, scored two runs and homered. Rowand had two hits, scored twice and hit a three-run double.
Ryan Vogelsong (6-1) got the win despite allowing a season-high six runs -- three earned -- and matched his high for the season with four walks in five innings.
Cubs starter Doug Davis (1-7) left after just 4 1-3 innings, allowing 12 hits, 10 runs and walking three.
Carlos Pena hit a two-run homer, walked and scored two runs for the Cubs. Blake DeWitt had two singles and three RBIs, and Koyie Hill added a solo homer for Chicago.
San Francisco jumped on Davis early, starting with Rowand's walk to lead off the game and Miguel Tejada's single. Rowand scored on Aubrey Huff's soft single to right-center, diving into the plate to barely beat the throw by Cubs center fielder Tony Campana.
Cody Ross singled to load the bases, meaning that the first four Giants had reached base. Davis recovered to get Pablo Sandoval to roll into a double play, which scored Tejada. Burrell tacked on a run with a two-out single.
The first-inning tally against Davis read: three runs, four hits, 24 pitches and a potentially long day for the Cubs' bullpen.
Vogelsong, who entered with a 1.86 ERA, hadn't allowed more than two runs since he gave up five against the Mets on May 3 _ a span of nine starts. The Cubs topped that in the second inning.
After Aramis Ramirez led off with a single, Pena homered into the right-field bleachers, pulling the Cubs within 3-2. It was Pena's eighth homer in his last 12 games and 17th since May 3, most in the National League.
With two outs the second, Hill snuck an 0-1 pitch from Vogelsong just inside the right-field foul pole, tying the game. It was Hill's second homer of the season and first since April 28. It was also the Cubs' sixth homer in their last two games.
Huff worked out a leadoff walk to start the third, then scored on Sandoval's double that just eluded Cubs right fielder Kosuke Fukudome.
Burrell followed that with his seventh homer, a shot to left that scored Sandoval and gave San Francisco a 6-3 lead.
The Giants broke the game open and chased Davis from the game with a five-run fifth, highlighted by a bases-clearing double by Rowand off Cubs reliever Chris Carpenter. Huff and Chris Stewart also drove in runs in the inning.
The five runs matched the best output in an inning for the Giants this season and was the fourth time they scored than many in a single frame. The Giants' leadoff hitter reached in each of the first five innings, including Vogelsong's bloop single up the right-field line to start the fourth.
Vogelsong worked out of jam in the third, striking out Ramirez and Pena with runners on the corners, but failed to settle down despite the big lead his teammates established.
Chicago battled back with three unearned runs against Vogelsong in the fifth, a rally that included three walks, an error on second baseman Bill Hall and a bad-hop single by DeWitt that eluded Hall and drove in two runs, trimming the Giants' advantage to 11-6.
Vogelsong was removed for pinch-hitter Nate Schierholtz in the top of the sixth. Schierholtz then drove in the Giants' 12th run with a single.
Tejada capped the Giants' scoring with a solo homer in the ninth, his second of the season and first since April 8.
Despite leading the NL West, San Francisco came in last in the majors in runs scored. During the Giants' five straight wins entering Tuesday, they had not scored more than five runs and hadn't surpassed that total since June 14.