The tipping point: The Astros had two outs and nobody on base against Matt Garza in the second inning when Chris Johnson singled, J.D. Martinez walked and Jason Castro homered to right center (on an 0-2 pitch, no less). An inning later, the Astros struck again with a two-out, run scoring single. Brian Bogusevic followed with a walk and Chris Johnson homered to center, making the score 7-0.

On the mound: Bud Norris pitched seven shutout innings, allowing five hits and three walks while striking out eight to lower his season ERA to 3.14. He is 4-0 with a major-league-leading 0.35 ERA in May. After Enerio Del Rosario and Fernando Abad collaborated to allow four hits while retiring only one batter, Wilton Lopez got the final two outs.

At the plate: The Astros scored all seven of their runs off Garza after there were two outs. Third baseman Chris Johnson jump-started a three-run second inning with a two-out single and polished off a four-run rally with a 429-foot blast to center that drove in three. Jed Lowrie had three hits, and his third homer in five games gives him seven for the season (most among National League shortstops). Castro's second-inning home run was the first time he has gone deep since July 19, 2010 against the Cubs' Mitch Atkins.