Jordan Pacheco blooped a tiebreaking single after an eighth-inning misplay and the Colorado Rockies beat Houston 9-7 Monday in the opener of the Astros' first doubleheader since 2006.
Matt Belisle (2-2) earned the win with a scoreless inning of relief, and Rafael Betancourt pitched a perfect ninth for his ninth save in 10 tries.
The Rockies won for just the seventh time in 25 games this month.
In the eighth, Astros shortstop Jed Lowrie fielded Dexter Fowler's two-out roller and flipped to second baseman Jose Altuve, who wasn't expecting the throw. The ball hit pinch-runner Jeremy Guthrie's right foot and bounced into center field, moving the runner to second and third. Fowler was credited with a single and Lowrie got an error.
Pacheco, who tripled home a run in the first, hit a two-run single in front of charging center fielder Jordan Schafer.
Fernando Rodriguez (1-5), who entered in the seventh, retired the first three batters he faced before walking pinch-hitter Jason Giambi,...