ANAHEIM -- Every time Ryan Vogelsong takes the mound, he thinks he has something to prove.
He feels he has to beat the top-tier pitchers in the league to prove that his 13-win season last year was no fluke, that he is one of the league's top guys himself.
And though he pitched at least seven innings for the fifth straight start Wednesday, it wasn't enough, as the Giants fell to Jered Weaver and the Angels, 6-0, in the series finale at Angel Stadium.
"I feel like, for me, to have people start believing that I'm real, I have to win these games against guys like Weaver, [Clayton Kershaw], the No. 1's on other teams," Vogelsong said. "And I wasn't able to do that tonight. It's disappointing."
The loss was the Giants' second straight and their fifth in their last seven games. It was the third time they've been shut out this season.
After a stretch of eight consecutive starts without a loss, Vogelsong gave up three runs on seven hits and two hit batters in the loss. He allowed more than two runs in a start for just the fourth time this season and the first time since he surrendered three against the Marlins on May 24.
The first hit Vogelsong allowed was Alberto Callaspo's homer in the second inning, his fourth of the season, that gave the Angels (38-32) a 1-0 lead. They added two insurance runs against Vogelsong in the fifth inning on RBI singles from Erick Aybar and Mike Trout.
"I thought Vogey threw well, and that's a tough lineup to get through," manager Bruce Bochy said. "That's a great effort from Vogey to keep us in there; we just couldn't do anything offensively. We ran into a very well-pitched game. That's what good pitchers do when they're on top of their game."
With Vogelsong out of the game, the Angels tacked on three more runs in the eighth against Shane Loux on back-to-back home runs from Kendrys Morales and Mark Trumbo and an RBI double from Bobby Wilson. The runs were the most Loux has given up in an outing all season and the first he has surrendered since May 20.
In his first start since straining his lower back May 28, Weaver (7-1) went six scoreless innings, giving up just two hits and two walks. He retired the side in order in the sixth, but with an 80- to 90-pitch limit, Angels manager Mike Scioscia lifted the righty after 78 pitches.
Ideally, the Giants (38-32) would have liked to get Weaver's pitch count up and get him out of the game as soon as possible. But for a guy like Weaver, who's constantly in the strike zone, that's easier said than done.
"He pounds the strike zone," Bochy said. "He has great command on both sides of the plate. It's not like you can sit up there and take off of somebody like that. He was throwing strikes, quality strikes; we just couldn't get some guys on. We just didn't put any pressure on him, and that's a credit to how well he threw."
The Giants' best chance against Weaver came with two men on and two out in the fifth inning, but Brandon Crawford popped to short to end the inning. In Weaver's last four starts, not including the one in which he got injured, he has an ERA of 1.29 (three runs in 21 innings).
Though it may have been easy for Weaver to be thinking about his back when he took the mound for the first time since injuring it, he said the thought never crossed his mind. It couldn't.
"If I was thinking about it, it wasn't good to be out there," Weaver said. "You want to get over that factor of it. I didn't think about it one bit. I just went out there and tried to fill the zone up as much as possible. They're a scrappy team over there. They're able to get some runs and get some hits when they need to. It was nice to keep that lineup off balance for the most part."
After Weaver's departure in the sixth, the Angels bullpen combined for three scoreless innings, extending its scoreless streak to 9 1/3 innings. The Giants had more than one baserunner in an inning just once the entire game.
Though all three games in which the Giants have been shut out this season have come in the last three weeks, Bochy said he's not worried about the offensive prowess of his club. The Giants scored 10 runs in their two games before Wednesday. They'll be fine, he said.
"This is a better offensive club," Bochy said. "We'll put more runs on the board. [Weaver] just pitched great today."
Joe McIntyre is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.