CHESTER, Pa. -- Sheanon Williams scored the go-ahead goal in the 72nd minute to help the Philadelphia Union beat the San Jose Earthquakes 4-2 on Sunday night.

Williams' goal came 2 minutes after San Jose had erased a two-goal deficit on Chris Wondolowski's score in the 70th minute.

Andrew Wenger added a breakaway goal in the 79th minute for the Union (7-9-9). Wenger also opened the scoring in the 10th minute on a smash into the top corner, assisted by Sebastien Le Toux.

Le Toux followed 4 minutes later with his own goal for a 2-0 lead, capitalizing on a weak clearance attempt by San Jose (6-10-7).

Sam Cronin got the Quakes on the board with a half-volley rocket into the top corner from well beyond the penalty box in the 59th minute.