Jason Giambi just hit his 400th home run in the bottom of the fourth inning against Dan Haren, taking a 85 mph, 3-2 pitch over the right field fence. Giambi returned to the dugout and received hugs from most of his teammates and later took a curtain call in front of a cheering crowd.
Giambi is the 44th player in major league history to hit at least 400 home runs, with 191 of those homers coming as an Athletic.
The A’s lead 4-1 in the top of the fifth inning, with all four runs coming off of homers. Jack Cust hit a two-run shot in the first inning, and Adam Kennedy also went deep in the bottom of the fourth.