SAN FRANCISCO — Barry Zito shook off the worst outing of his big league career to give the Giants another impressive effort from their starting rotation.
Buster Posey's first home run of the season made sure it held up. Zito and Chad Gaudin combined on a six-hitter and San Francisco beat the San Diego Padres 5-0 on Sunday to complete a three-game sweep.
Zito (3-1) bounced back five days after getting shelled by the Milwaukee Brewers when he failed to make it out of the third inning. He allowed five hits in seven innings against the Padres, struck out four, walked one and did not give up run for the third time in four starts.
"If you let outings bleed into the next one, that's when things kind of go bad, so you just have to stick with your approach," Zito said after beating San Diego for the first time in nearly two years.
"I felt pretty good in my game and the results weren't there last (time). I felt pretty good today and the results were there. That's just the nature of the game."
Zito's outing followed gems by San Francisco starters Madison Bumgarner and Tim Lincecum, and helped the Giants sweep the Padres in a series of three games or more for the first time since Sept. 12-14, 2011.
San Diego, held scoreless for the last 21 innings, had opened its six-game trip by taking three straight from the Los Angeles Dodgers.
Zito retired 13 of his final 16 batters before leaving to a standing ovation after fanning Will Venable to end the seventh. He had given up nine runs in 2? innings during Tuesday's 10-8 defeat at Milwaukee, ending his streak of 16 starts without a loss.
"Good for Z," Giants manager Bruce Bochy said. "It was a great job on Barry's part of bouncing back. You have to be resilient in this game. He had good command today and made his pitches."
Gaudin allowed one hit over the final two innings to complete the Giants second straight shutout.
San Diego has started 5-13 for the second straight season. The Padres didn't have an extra-base hit in the game and failed to get a runner to second base over the final seven innings. "I didn't think it would turn out this way after our at-bats in L.A.," San Diego manager Bud Black said. "Bumgarner pitched a great game, Lincecum picked it up and Zito just carried it over."
Posey's first home run of the season was just the 11th this year for the power-starved Giants. Before the two-out, two-run drive off Eric Stults (2-2) in the fifth, Hunter Pence, Pablo Sandoval and Brandon Crawford had accounted for all of San Francisco's homers.
Angel Pagan put San Francisco ahead with a two-run double in the third, two innings after his heated discussion with plate umpire Bob Davidson. Pagan believed he had been hit on his back foot by an 0-2 pitch from Stults and argued with Davidson for several minutes, at one point repeatedly pointing his finger at the umpire while standing in the batter's box.