HOUSTON (AP) - With their pitching, the San Francisco Giants figure if they can get about three runs a game they should win on most days.
On Wednesday, they blew right past that mark, beating the Houston Astros 10-4 to complete a season-opening three-game sweep.
Edgar Renteria tied a career high with five hits to help the Giants to a 3-0 record for the first time since 2003, when they began with a sweep at San Diego and won seven straight. Houston last started 0-3 in 2007.
"When you come to the ballpark every day and feel like you've got a really good opportunity to win some games because of the guy who's on the hill, that's a good feeling," said Aaron Rowand, who had four of the Giants' 19 hits. "That's a confidence-builder in itself."
It was 4-all when Juan Uribe doubled in the eighth inning and scored the go-ahead run when Sammy Gervacio (0-1) threw away a bunt. The Giants added another run in the inning, then scored four times in the ninth.
John Bowker had a two-run homer and Travis Ishikawa added his first career pinch-hit home run.
Jeremy Affeldt (1-0) got the win in relief of Matt Cain, who allowed six hits and three earned runs in 6 2-3 innings.
"With the way these guys were swinging in spring it gives us a bunch of confidence out there on the mound that if we give up a couple of runs like we did out there today ... those guys can come right back to pick us up," Cain said. "That builds a lot of confidence for the starters and the relievers and I think it builds confidence for those guys as well."
Rowand, the Giants' leadoff man, and Renteria, the No. 2 hitter, each drove in two runs.
Astros starter Brett Myers gave up a career-high 12 hits and four runs in six-plus innings in his Astros debut.