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Chicago, IL (Sports Network) - Bud Norris tossed six scoreless innings and Jason Castro homered as the Houston Astros claimed a 3-0 victory over the Chicago Cubs in the middle portion of a three-game series.

Norris (7-13) allowed only four hits and a pair of walks while striking out four, and Tyler Greene added an RBI single for the Astros, who surged to their fifth win in six games.

Chris Volstad (3-12) gave up five hits and and one earned run with six strikeouts for the Cubs, who were blanked by the same score for the second straight game and lost for the ninth time in their last 10.