CHICAGO, Sept. 1 (UPI) -- Neil Walker went 4-for-5 and drove in four runs Tuesday, sparking the Pittsburgh Pirates to a 14-7 victory over the Chicago Cubs.
Walker socked a two-run homer in the sixth and capped the Pirates' scoring with a seventh-inning, two-run double.
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Garrett Jones went deep and drove in three runs and Jose Tabata went 3-for-5 with a pair of RBI for the Pirates, who evened their three-game series at one win apiece.
Jeff Karstens (3-10) notched his first victory since June 19, holding the Cubs to two runs on four hits over six innings.
Koyie Hill homered, went 3-for-4 and drove in a pair of runs for Chicago.
Cubs starter Ryan Dempster (12-9) was roughed up for seven runs on seven hits in three innings.