WOW, a MLB first. Two guys from the same team on Opening Day!
Tony Clark and Arizona newcomer Felipe Lopez each homered from both sides of the plate...
Lopez and Clark became 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.
Colorado Rockies vs. Arizona Diamondbacks - Recap - April 06, 2009 - ESPN