Zito delivers again as Posey, Giants sweep Rockies

AP - Sports
Zito delivers again as Posey, Giants sweep Rockies
Colorado Rockies' Troy Tulowitzki (2) tosses his helmet after being called out on strikes by umpire Laz Diaz during the first inning of a baseball game against San Francisco Giants in San Francisco, Wednesday, April 10, 2013. (AP Photo/Jeff Chiu)
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