Halladay (3-1) took a two-hitter into the ninth before allowing three singles, including Will Venable's RBI base hit with two outs. Antonio Bastardo came on with runners on first and third and got pinch-hitter Nick Hundley to fly out to left on his first pitch, for his first save.
Shane Victorino hit an inside-the-park home run leading off the seventh inning when his drive into the gap in right-center came off Venable's glove as his arm hit the ground while trying to make a diving catch. The ball rolled into center as Victorino rounded the bases and came in with a headfirst slide. It was the first of his career. The Phillies have won a season-high five straight. They've won 11 straight at Petco Park, and 15 of 16, since the 2008 season.
Halladay was so dominant, mostly with his split-fingered fastball, that San Diego didn't get a baserunner past first base until the ninth. He allowed only five singles while walking one. Halladay, who struck out at least 10 for the 12th time in his career, fanned six straight at one point. He struck out everyone in the lineup except pitcher Wade LeBlanc.
He retired 16 in a row until allowing two singles in the ninth.
Halladay also struck out 14 on June 2, 2009, against the Angels.
The Phillies opened the sixth inning with four straight hits to score two runs before LeBlanc limited the damage. Jimmy Rollins and Ryan Howard singled, Ben Francisco had an RBI single to left and John Mayberry Jr. an RBI double to left. After Carlos Ruiz was intentionally walked to load the bases, Francisco was forced at home and Halladay hit into an inning-ending double play.
LeBlanc (0-1), called up earlier in the day from Triple-A Tucson to make the start, allowed three runs and nine hits in eight innings, walked four and struck out two.
NOTES: Victorino's inside-the-park HR was the first for the Phillies since Chase Utley did it on July 9, 2009, against Cincinnati. It was the first against San Diego since Colorado's Garrett Atkins on Sept. 23, 2007. That homer came about when left fielder Milton Bradley stepped on center fielder Mike Cameron's right hand while the two pursued the ball. ... The Padres made room for LeBlanc by optioning reliever Pat Neshek to Triple-A Tucson. Manager Bud Black said the Padres will likely need to make another move to bring a reliever back up.