HOUSTON (August 19, 2012) -- The Houston Astros lost in their first game under interim manager Tony DeFrancesco as Aaron Hill homered twice to give the Arizona Diamondbacks an 8-1 win Sunday and a sweep.

DeFrancesco was the manager at Triple-A Oklahoma City before being promoted. The Astros, with the worst record in the majors, fired Brad Mills late Saturday night.

Houston general manager Jeff Luhnow said he made the move to "bring in a new environment" to the National League's youngest team. But on Sunday, things didn't seem much different as the Astros dropped their fourth straight and fell to 7-33 in their last 40 games.