Errors costly in Astros' opening loss

In the bottom of the ninth, pinch hitter Travis Buck doubled and Castro walked with two outs against Rafael Betancourt. Pinch hitter Matt Downs struck out swinging to end it.

NOTES: The Astros have an average age of 27.82. Only the Royals have a younger team with an average age of 27.42. ... Helton has started the last 15 opening days for Colorado, which is the longest active streak in the majors. ... The Rockies are opening on the road for the fourth time in five seasons. ... Former President George H.W. Bush and wife Barbara attended the game. They weren't in their customary front-row seats behind home plate, instead sitting in the second row near Houston's dugout. ... Former Texas quarterback Vince Young also attended the game and was on the field for batting practice. ... The teams continue the series on Saturday with 49-year-old Jamie Moyer pitching for the Rockies against Houston's Lucas Harrell.