SAN DIEGO (AP) - The San Diego Padres pride themselves on pitching and defense. Both came up short in a 7-4 loss to the Pittsburgh Pirates.

Ryan Doumit's grand slam highlighted a six-run third inning and Kevin Correia beat his old team Wednesday, when the Pirates won to take two of three from the Padres.

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Two errors in the third inning led to six unearned runs for the Pirates.

``It hasn't (clicked),' manager Bud Black said of the Padres' defense. ``Those games where we've had miscues, we haven't been able to overcome them by outscoring the other team.'

The Pirates are playing well away from Pittsburgh. They've won five road series already, one more than they did all of last year. They've got 11 road wins - last year they didn't get their 11th until June 28.

The Padres are a major league-worst 5-13 at home.

Correia (5-2), has won all five road starts this year, with a 1.55 ERA. He allowed two runs and five hits in six-plus innings, struck out three and walked two.

The Padres didn't bring back Correia after he went 10-10 with a 5.40 ERA last year, when he lost his spot in the rotation in September. The year before, he was San Diego's most consistent starter, going 12-11 with a 3.91 ERA in 33 starts.

Pittsburgh benefited from two Padres errors in the third to score six unearned runs on just three hits against lefty Clayton Richard (1-3).

After Correia struck out, Andrew McCutchen singled and was safe on Xavier Paul's dribbler in front of the plate when catcher Nick Hundley threw wide of second for an error. The Pirates loaded the bases when third baseman Chase Headley couldn't get the handle on Matt Diaz's grounder for another error. Neil Walker hit a two-run single before Steve Pearce walked to load the bases again.

Doumit unloaded them with a grand slam to left on a full-count for a 7-0 lead. It was his third career grand slam and second homer of the season.

``You have to make plays,' Black said. ``You can't afford to extend innings and it hurt us in the biggest way with the grand slam.'

Walker drew a leadoff walk in the second and eventually scored on a force play.

Correia was chased in the seventh when Brad Hawpe doubled in Cameron Maybin, aboard on a leadoff single. The Padres scored their first run in the fourth when Will Venable hit a leadoff triple and came in on Ryan Ludwick's groundout.

San Diego's Brad Hawpe hit his first homer of the year, a solo shot to center leading off the ninth off Jose Veras. It went an estimated 435 feet. With one out, Eric Patterson hit a solo shot to right, his second in as many games.

Richard is winless in six starts since a victory at St. Louis on April 2, the second game of the season. He allowed seven runs, one earned, on four hits in five innings. He struck out four and walked three.

NOTES: Correia is the first Pirates pitcher to win his first five road starts since Don Robinson, who won his first seven in 1982. ... The Padres placed 2B Orlando Hudson on the 15-day DL with a strained right hamstring and selected infielder Logan Forsythe from Triple-A Tucson. Hudson was hurt in Tuesday night's 6-5 win. Forsythe made his big league debut, grounding out while pinch-hitting for Richard. ... The Padres also transferred LH reliever Joe Thatcher from the 15-day to the 60-day DL.