Houson's Rookie Jason Hirsh (3-4, 5.83 ERA)
He limited the Pirates to one run in seven innings of Houston's 13-1 win Aug. 27.
The Pirates (65-92) counter with Shawn Chacon (7-6, 6.25),
The right-hander, though, has struggled in two starts against the Astros this season, going 0-2 with an 18.00 ERA in six total innings