Oswalt (3-4) snapped a personal three-game losing streak, allowing two runs and seven hits while walking two and striking out five. He threw only 83 pitches and improved to 5-2 lifetime against the Pirates.
The righthander fell awkwardly at second base on a double down the right field line in the seventh. He received a visit from the trainer but stayed in the game and jogged home on
While it appeared Oswalt wrenched his back on his fall at second, manager
said he strained his groin running home on Biggio's gapper.
"Hopefully, it won't bother me tomorrow," Oswalt said. "Don't want to rush things this early in the season. Just glad it's not my arm."
Hidalgo smacked an RBI double, then scored the tying run on
's double in the fourth inning. He also gave Houston the lead for good with a long home run down the left field line in the sixth.
"I felt pretty good today," said Hidalgo, who hit his sixth homer, nine off his 2002 total. "I just tried to stay with the ball. They threw the ball inside and I made a pretty good hit on it."
Biggio had two RBI and Vizcaino went 3-for-4 for the Astros, who completed a 4-3 road trip with their 11th win in 12 games against Pittsburgh.
"This is the second series in a row we won against them," Vizcaino said. "This is what we should do on the road because we've been playing pretty good at home."
(4-5) was effective in a losing effort, giving up three runs and six hits with a walk and five strikeouts in six innings. He fell to 2-7 lifetime against Houston.
After Wednesday's 3-2 win over Houston, McClendon claimed his team would be in the pennant race a month from now. They began Thursday 7 1/2 games behind the first-place
in the National League Central.
"Pittsburgh has a good team," Biggio said. "We capitalized on a couple of things in these games."
The Pirates grabbed a 2-0 lead in the third on an RBI groundout by Simon and run-scoring single by Stairs. But Stairs was thrown out at the plate to end the inning, and Hidalgo and Vizcaino tied it with back-to-back RBI doubles in the fourth.
Hidalo then put Houston ahead for good with a long home run onto one of the walkways over the left field wall, just inside the foul pole.
"I knew Hidalgo's was going to be out, just hoping it was going to be foul," Benson said. "Definitely needed a better pitch, one that was down, not down the middle of the plate."
Oswalt crossed the plate to make it 4-2 in the seventh. He left after facing just one more the minimum over his last three innings, striking out two in a perfect sixth.
"We were facing a guy in Oswalt that has been unbeatable," Stairs said. "We had a chance to get him early in the game, but he threw some quality pitches."
The Astros capped the scoring with two runs in the ninth as Biggio and
stroked two-out hits.