Weaver, who won a personal-best 14 games for the Dodgers last year, equaled that mark by throwing a three-hitter in his fifth career shutout, a 7-0 victory over Colorado on Sept. 12.
He continued his strong effort against San Francisco Saturday, allowing two runs in eight innings, but Los Angeles could not muster enough offense in a 2-1 defeat.
“It’s a shame a guy pitched as well as Jeff Weaver did and absorbed that loss,” Dodgers manager Jim Tracy said. “On the flip side, we had only three hits. You’re not going to win with one run and three hits.”
Weaver is trying to become the first Dodger pitcher to win 15 games since Hideo Nomo in 2003. Weaver is 7-2 with a 3.99 ERA in 13 starts since the All-Star Break.
Los Angeles has managed just six victories in its last 18 games. The Dodgers suffered their fifth straight defeat, 3-2 to the Diamondbacks on Wednesday.
Starter Brad Penny, bothered by tightness in his forearm, lasted only two-thirds of an inning while Jeff Kent, who leads the Dodgers in virtually every offensive category, sat out with a stiff lower back.
Shawn Estes will take the ball for the Diamondbacks on Thursday in his second attempt at his 100th career win. He gave up seven runs, six hits and three walks in 2 2-3 innings of a 14-2 loss to Milwaukee on Thursday.
Arizona manager Bob Melvin insisted he has not lost faith in the struggling left-hander, despite pinch-hitting for Estes with two outs in the Diamondbacks’ third.
“It doesn’t mean I don’t have any confidence in Shawn, because I do,” Melvin said.
Estes, who began his career with San Francisco in 1995, is 2-4 with a 9.56 ERA in his last six starts.