Bourn connected off Kyle Kendrick (1-2) in the fifth inning to help beat his former teammates a night after the Phillies scored four runs off closer Jose Valverde to win in the bottom of the ninth.
Oswalt (1-3) finally looked like a three-time All-Star instead of the worst pitcher in the National League. The right-hander gave up one run and five hits to snap a three-game losing skid and beat the Phillies for the sixth straight time. Oswalt came in first or tied for first in the league in losses, runs allowed and hits allowed.
Wesley Wright pitched the eighth and Doug Brocail finished for his first save since earning one with Texas in 2005.
Jimmy Rollins - hindered by a sprained left ankle - ripped a two-out single as a pinch hitter in the ninth inning to try to spark a Phillies rally. He hobbled to first base and was replaced by pinch-runner So Taguchi. Brocail then struck out pinch-hitter Greg Dobbs to end it.
Bourn, a speedy leadoff hitter, turned on an inside pitch and hit it high off the right-field foul pole to give the Astros a 2-1 lead in the fifth.
Bourn was a valuable part of Philadelphia’s division-winning team last year, contributing as a late-inning defensive replacement, pinch runner and filling in as a starter when other outfielders were injured. With center fielder Shane Victorino on the disabled list, the Phillies could use Bourn right now.
Bourn was traded to the Astros along with reliever Geoff Geary and minor leaguer Mike Costanzo for closer Brad Lidge last November.
Kendrick allowed two runs and four hits in his best outing so far. The right-hander struck out five and walked one.
Kendrick lasted a total of 7 1/3 innings in his first two starts, but resembled the pitcher who came out of nowhere to win 10 games last season to help the Phillies win the NL East.
Carlos Lee’s RBI double off the left-field wall gave the Astros a 1-0 lead in the first. Ryan Howard tied it with a two-out RBI single in the bottom half.
Oswalt hasn’t lost to the Phillies since May 9, 2003. He’s 6-1 lifetime against Philadelphia. His six-game winning streak against the Phillies is the longest by any pitcher since Tom Glavine won seven in a row with Atlanta from 1990-92.
