CHICAGO, July 22 (UPI) -- Yusmeiro Petit pitched six scoreless innings and Chris Snyder homered Sunday as the Arizona Diamondbacks posted a 3-0 win over the Chicago Cubs.
Petit (2-2) yielded just three hits without surrendering a walk and struck out five. Jose Valverde pitched the ninth for his 30th save in 33 chances.
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Conor Jackson had two hits and an RBI, and Chris Snyder had two hits, an RBI and a run scored for the Diamondbacks.
Chicago starter Sean Marshall (4-4) went six innings, allowing one run on five hits with two walks and five strikeouts.
Alfonso Soriano, Ryan Theriot, Mike Fontenot and Jason Kendall accounted for the four hits for the Cubs, who lost their first series at home since June 15-17 against San Diego.
