HOUSTON, May 16 (UPI) -- Jose Vizcaino delivered a two-out, two-run single to snap an eighth-inning tie and support a terrific outing from Roy Oswalt as the Houston Astros won their fifth straight game Thursday night with a 3-1 victory over the Pittsburgh Pirates.
Richard Hidalgo led off the eighth with a single and Geoff Blum sacrificed. Reliever Brian Boehringer (0-1) then intentionally walked former Pirate Orlando Merced and was replaced by Scott Sauerbeck.
Gregg Zaun hit for Oswalt and grounded out, moving the runners up a base. That brought up Vizcaino, who hit an 0-2 delivery to left field, scoring Hidalgo and Merced.
Oswalt (5-2) allowed just one run and seven hits in eight innings while striking out a season-high 11, but Pirates rookie Josh Fogg was equal to the task, allowing a run and two hits in six innings. Oswalt struck out the side in the eighth but the game was tied at 1-1.
Astros closer Billy Wagner allowed singles to pinch hitter Craig Wilson and Jason Kendall to open the ninth but got Kevin Young on a flyout and induced Mike Benjamin to ground into a double play for his sixth save in seven chances.