There is a fajita stand on the first base line in the main concourse, they cook the meat right in front of you fresh, and serve them on a bed of nacho chips. You can load up on salsa, jalapenos, etc at the condiment table, and you end up with an awesome restaurant quality meal of two chicken or steak fajitas and nachos for like $9.
The other place to eat would be Green Fork, located behind home plate. It's a salad stand, they have four different kinds, or create your own. I recommend the Cobb. The thing is huge, and it's only $8. All fresh, very good. I'm telling you, it's big. Best bargain in the stadium.
The sliders stand on the third base line i'm told is very good, but I dont eat burgers. A little pricey at $11, but im told well worth it.
Everything else in the building is overpriced shit.