The victory gave the Padres a second consecutive series victory, extended their winning streak to three straight games at Petco Park -- their longest home winning streak since early June -- and allowed them to close to within two games of the Dodgers in the National League West.
Peavy is still 7-12 on the season with a 4.35 ERA.
But over the past six games, the 25-year-old has looked like the pitcher who led the National League in ERA in 2004 and in strikeouts last season.
"I feel no different the last two months than I did the past two seasons," said Peavy, who battled tendinitis in his pitching shoulder earlier this season.
Over his last six starts, Peavy is 3-2 with a 2.01 ERA -- although the Padres have failed to score a run while he was still in three of those games.
In fact, the Padres have failed to score behind Peavy (while he was still in the game) in eight of his 25 starts. And Tuesday night marked the 11th time they have gotten him one of zero runs. Peavy ranks 83rd among 90 qualifying major league pitchers in run support.
Padres manager Bruce Bochy acknowledged that fact in his postgame remarks.
"That was all Jake putting up zeros," the manager said. "We finally got a run for Jake."
Peavy on Tuesday tied Dave Dravecky for ninth on Padres' all-time win list with 53. He also became the sixth Padre to reach the 800-strikeout plateau.