SAN FRANCISCO — Barry Zito is used to hearing a chorus of boos when he walks off the mound at AT&T Park. If he continues to pitch well, standing ovations may become the norm.

Zito pitched into the seventh inning to win his second consecutive start and the San Francisco Giants beat the Pittsburgh Pirates 9-3 Monday night.

Bengie Molina went 4 for 4 with four RBI for San Francisco, which is tied with Philadelphia for the best start in the majors at 6-1. Pablo Sandoval had three hits and scored twice.

Zito (2-0) allowed three runs and five hits in his 100th career start with the Giants. The left-hander has won his first two starts for the first time since 2003, when he finished 14-12.

Akinori Iwamura and Andy LaRoche had two hits apiece for the Pirates, who have lost six straight at AT&T Park. Iwamura had two RBI and LaRoche scored twice.

The Giants finished with 12 hits and received plenty of help from Pittsburgh's pitchers, who walked six and hit three batters.

Fill-in starter Brian Burres (0-1) allowed six runs and eight hits in four innings for the Pirates.

Burres, who was called up after Ross Ohlendorf was scratched due to back spasms, was selected by San Francisco in the 31st round of the 2000 draft and spent six years in the Giants' minor league system but never got higher than the Double-A level.