Uggla's third spring training homer came in the second inning off Darin Downs, who allowed just the one hit in two innings. Uggla tripled off Kevin Chapman in a three-run third.
Atlanta's Alex Wood struck out six and gave up two hits in five innings.
Carter Gattis had two hits for the Braves and scored on Uggla's triple.
Chapman gave up five hits in one inning.
Brett Oberholtzer and Jerome Williams, candidates for Houston's rotation, pitched in an intrasquad game in anticipation of the rain.
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