Walker's homer, 5 RBIs lead Pirates past Arizona

AP - Sports
Walker's homer, 5 RBIs lead Pirates past Arizona
Pittsburgh Pirates' Neil Walker (18) swings on a pitch by Arizona Diamondbacks' Ian Kennedy and hits it for a three-run home run in the first inning of the baseball game Wednesday, Aug. 8, 2012, in Pittsburgh. (AP Photo/Keith Srakocic)
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