Madison Bumgarner pitched eight shutout innings, allowing only three hits and two walks while striking out six. Rangers hitters looked uncomfortable against him, rarely squaring up the ball resulting in weak contact.
Aubrey Huff provided the game-winning hit for the Giants, launching a two-run home run off of Rangers starter Tommy Hunter in the third inning.
San Francisco led by a 2-0 margin until the seventh inning when Giants centerfielder Andres Torres hit a double to deep center, scoring Edgar Renteria from first on a designed hit-and-run by Giants manager Bruce Bochy.
Buster Posey added a solo home run in the top of the eighth to give the Giants their fourth and final run.
Rangers starter Tommy Hunter lasted only four innings while getting hung with the loss. He allowed two earned runs – both coming on the Huff home run – on five hits and one walk.
Alexi Ogando came on in relief of Hunter and pitched one and two thirds innings before injuring his oblique. Ogando is likely out for the remainder of the World Series.
Texas will now have to win three straight games to claim the World Series title. Cliff Lee will take the mound against Giants ace Tim Lincecum in Game 5, which will take place Monday night in Arlington.