Jung Ho Kang hit a tiebreaking home run in the eighth inning and the Pittsburgh Pirates beat San Francisco 4-3 on Tuesday night to knock the Giants out of first place in the NL West. Andrew McCutchen had two hits while Gregory Polanco drove in two runs without a hit to help the Pirates remain one game behind the second NL wild card. Kang homered off reliever Derek Law (4-2) one pitch after McCutchen was thrown out attempting to steal second base.