Padres 5, Pirates 2: Jedd Gyorko belted a three-run homer among his three hits and San Diego continued its domination in Pittsburgh.

Eric Stults (9-13) snapped a 10-start winless drought with his first victory since before the All-Star break, allowing two runs on seven hits in five innings as the Padres improved to 30-10 all-time at PNC Park. Tim Stauffer and Nick Vincent combined for three scoreless innings before Luke Gregerson earned his fourth save.

Jeff Locke (10-6) lasted five innings and gave up four runs on seven hits and three walks as the Pirates dropped one behind first-place St. Louis in the National League Central. Marlon Byrd drove in both runs for Pittsburgh, which fell to 6-3 in its last nine.

Gyorko launched his 19th homer in the third to stake the Padres to a 3-0 lead, but the Pirates answered with a pair in the bottom of the inning on Byrd's two-out, two-run single. Byrd attempted to score on Gaby Sanchez's infield hit but was thrown out by shortstop Ronny Cedeno.

San Diego added a run in the fourth on Chris Denorfia's double-play grounder and extended the lead to 5-2 in the seventh on Tommy Medica's RBI single. Cedeno added three hits as the Padres won for the 18th time in their last 21 games in Pittsburgh.

GAME NOTEBOOK: Pirates CF Starling Marte was back in the starting lineup for the first time since Aug. 18 due to a hand injury. He went 1-for-3. ... Padres RHP Huston Street was away from the team for a second straight game to tend to his grandmother's funeral in Texas. ... Major League Baseball on Tuesday celebrated Roberto Clemente Day in honor of the legendary Pittsburgh right fielder who was killed in a plane crash in 1972 while helping to deliver aid to earthquake victims in Nicaragua.