Buster Posey. I mean, can I make an update just say that, because I really should. Aubrey Huff ground out to start the top of the eighth, and then Darren Oliver was pulled in favor of Darren O'Day. Then Buster Posey came up to bat and slammed a home run after taking a couple pitches. This gave the Giants even more insurance with a 4-0 lead.
Cody Ross was the next batter, and he popped out to first baseman Mitch Moreland. Juan Uribe worked to a 2-2 count off of O'Day. Then a full count, making O'Day work for it, but he eventually popped out to first to end the top of the eighth.
Buster Posey is the youngest player in Giants history to hit a home run in the World Series. Be sure to head over to McCovey Chronicles and take part in their gameday thread, that is, if you're a Giants fan.