re: Mariners have best beer - Yankees serve shite

You can find the good stuff at AT&T in SF, but it seems as if the stadium is more dominated by BMC. I've had Lagunitas IPA at the park but also don't necessarily wander too far to get my beer. Whenever I attend games (which has been less frequently as of late), I usually go to one of the bars in the area beforehand and grab a couple good beers and then only grab one beer once I'm in the stadium.