MLB: Houston 4, Pittsburgh 1

Sept. 22, 2012 at 10:27 PM

HOUSTON, Sept. 22 (UPI) -- Dallas Keuchel tossed seven efficient innings and Jason Castro belted a tie-breaking homer Saturday in the Houston Astros' 4-1 win over Pittsburgh.

Keuchel (3-7) stymied the Pirates on four hits, yielding one run while issuing a single walk and striking out seven. The left-handed rookie won his second straight start after dropping seven consecutive decisions.

Hector Ambriz hurled a scoreless eighth inning and Wilton Lopez finished up with a 1-2-3 ninth for his seventh save as the Astros clinched their three-game set.

Castro went 2-for-3, including his decisive, three-run shot in the seventh.

Pittsburgh's Kevin Correia (11-10) struck out nine over six full innings, yielding four runs (three earned) on seven hits while walking one.

Gaby Sanchez socked a solo homer for the Bucs.

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