Giambi became the oldest player to hit a walk - off homer .
In game one , the Sox lost 3 - 2 due to a pinch - hit walk - off homer by 42 - year - old veteran Jason Giambi .
veteran became the oldest player to hit a walk - off homer .
In game one , the Sox lost 3 - 2 due to a pinch - hit walk - off homer by 42 - year - old veteran Jason Giambi .