Jason Bay hit a two-run home run and the game-winning single in the 14th inning against a drawn-in outfield to help the Pittsburgh Pirates come back to beat the Chicago Cubs 5-4 Saturday night.

The Pirates, who led 3-1 until the Cubs went ahead with three in the eighth against reliever Tyler Yates, tied it at 4 in the ninth on Luis Rivas’ sacrifice fly against Kerry Wood.

Freddy Sanchez reached when shortstop Ryan Theriot threw wildly on his grounder to start the 14th and moved up on Michael Wuertz’s wild pitch. After Sanchez advanced to third on Rivas’ grounder and Wuertz (0-1) intentionally walked Nate McLouth, Bay lofted a long fly close to the warning track in center to win it.

John Grabow (4-1) pitched three scoreless innings for the victory.