Our old pal Ceetar has a long write-up about the beers of Citi Field. You should read it!
Larger beers. That seems to be the theme here. Some token ABI craft, the Blue Point Mosaic IPA is not bad, and then a lot of 25oz offering. Obviously, beer geeks like myself are not the prime audience for this. For the rest of the population, being able to drink Blue Point Toasted Lager, or Kona Longboard, or Goose Island Urban Wheat is actually pretty nice.