PHOENIX — Tony Clark and Arizona newcomer Felipe Lopez each homered from both sides of the plate, and the Diamondbacks beat the Colorado Rockies 9-8 in a home run derby of an opener Monday.

Eight home runs were hit in the game, including the decisive shot by Chad Tracy leading off the seventh inning against reliever Jason Grilli.

Lopez and Clark are the first switch-hitting teammates to homer from both sides of the plate in a game since Jorge Posada and Bernie Williams did it for the New York Yankees on April 23, 2000. It had never been done on opening day.