BALTIMORE, (AP) Rookie left-hander Brett Oberholtzer allowed three hits over seven innings to earn his first major league win, Jason Castro hit a grand slam and the Houston Astros beat the Baltimore Orioles 11-0 Wednesday night.
Matt Dominguez homered and had a career-high four hits for the Astros, who built a 9-0 lead in the fourth inning and coasted to their most lopsided victory of the season.
Oberholtzer (1-0) was thrust into the starter's role after Erik Bedard was scratched with a sore shoulder. Making his fourth appearance and first start in the big leagues, Oberholtzer struck out six, walked none and did not let a runner get past first base.
Hours before the first pitch, the Astros traded right-hander Bud Norris to the Orioles for outfielder L.J. Hoes and a minor league prospect.