San Diego and the surrounding area house many reputable and influential craft breweries, such as Stone, Ballast Point, and Green Flash, and they are well represented at the ballpark. I saw all of them, with the additions of Karl Strauss and Mission Brewery, lining up in individual stalls like in a farmer's market. And you get more selections of craft brews in bottles around the ballpark. While you only get the most popular beers that each brewery has to offer--and usually one light and one dark, the composite of all of them together is quite impressive and more than enough to satisfy even a beer snob like me!
I downed two beers that I could already more or less recall their flavors with great accuracy: Sculpin IPA from Ballast Point and Arrogant Bastard from Stone. Both came in 20 oz. cups for 11.25$ plus tax. The price might seem high, but 20 oz is almost 2 bottles and these are pretty high-alcoholic beers (both are around 7%).